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S-Locks M

€31.22 *

Prices incl. 19% VAT (only European Union) plus shipping costs

Delivery time approx. 10 days

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1 set S-locks complete with strap button  M  (4,0 x 22mm) New Schaller S-Locks -... more

1 set S-locks complete with strap button M (4,0 x 22mm)

New Schaller S-Locks - protect your Love

Explanation video:


Detailed installation instructions at the end of the product description below.




In 1981, Schaller developed and got the patent for a totally new category of product, which revolutionized the connection between guitar and strap.

With its unique design and functionality, Schaller has been setting the standard in strap locks for decades.

We protect your beloved instruments.


In 2018, Schaller will pave the way for the next generation of revolutionary strap locks.

 Schaller proudly presents: 

The new S-Locks, 

S for safe, S for silent and S for Schaller strap locks! 

These new revolutionary S-Locks are silent. They feature an elegant Lock-Wheel, one-piece hardened steel strap buttons, aesthetic design, perfect handling and all former hiccups have been tackled!

3 pieces = 1 S-Lock - perfect!


Strap button   

New and unique solid one-piece strap button in hardened steel with self-tapping wood thread. Simply screw it on with an Allen key (size 3mm/ 1/8").

  • 4 mm/ 5/32“ screw with self-tapping wood thread for maximum hold in wood for almost all instruments with existing screws in standard dimensions; for all other cases we offer strap buttons in L and S format (see below); in any case, please read our installation instructions below carefully;
  • hardened steel and more than double thickness of the strap button guarantees maximum security against breakage,
  • Including high-grade felt washers for ultimate protection of guitar's finish.



  • extended thread length for holding straps of up to 6 mm thickness,
  • new designed slanted locking bolt in stainless steel for permanent precision, reliable performance and wear-free finish,
  • new designed pull-up ball for easy-grip lock and release.
  • suitable for a standard hole in the strap of 10mm



New Lock-Wheel with unique 3-Step security function:

  1. Screw our lock wheel with patented self-locking thread tool-free by hand, you already protect your guitar sufficiently (the round shaping must be facing the pull-up ball!).
  2. Use a 2 mm or 5/64’’ Allen key or screwdriver to tighten it for maximum security.
  3. Use our micro cone-top screw M2,5x5mm to attach it permanently.

You will never lose your wheel again!


Finally put all parts together and just listen carefully…

Give it a shake, give it a roll and prepare to be amazed: 

It is silent!

New silent feature for noiseless performance while moving and playing your instruments.

Schaller - the Original Innovators! 


All S-Locks come in a new and attractive re-usable crystal box.  


Two more things …

1.) S-Locks are compatible with all existing Schaller Security Locks like this:

  • strap button old SecLock + lock new S-Lock
  • strap button new S-Lock + lock old SecLock only limited, we do not recommend it.

Please always use our new S-Lock lock with Lock-Wheel on your strap, then you will always be compatible with all strap buttons and at the same time you will always use all the advantages of our new Lock-Wheel.

Please always make sure that the lock is engaged in the strap button, the lock is attached to the belt in such a way that the strap button is secured in the U-shape of the lock and that the instrument does not rotate.


2.) Only one strap and one pair of S-Locks, …for all your guitars!

Enjoy all the benefits of our new S-Locks using one single strap.

Simply use our new strap buttons replacement kits to new S-Locks for all your instruments!


Three different strap buttons to choose from:

L = thread 4,5 mm, length 27 mm 

M = thread 4,0 mm, inside 3,0 mm; length 22 mm (standard)

S = thread 3,5mm, inside 2,4 mm; length 18 mm 




Assembly instructions Schaller S-Locks

Our Schaller S-Locks come in a attractive re-usable crystal box that you can use as a storage container after removing the protective foam.



It contains:

2x Strap button with high-grade felt washers


2x Lock

S-Locks-SC-B_V2-Schloss-400px S-Locks-SC-A_V2-Schloss-400px

2x Lock-Wheel


1.) Assembly of the strap buttons

Screw the strap buttons with attached felt washer into the existing holes by hand with a 3mm/1/8" Allen key. Please make sure that the strap buttons sit fully on the wood, if necessary, first rub the wood flat.

If there is still no drill hole, drill this depending on the wood used.

Three different strap buttons to choose from:

L = thread 4,5 mm, length 27mm 

M = thread 4,0 mm, inside 3,0 mm; length 22 mm (standard)

S = thread 3,5mm, inside 2,4 mm; length 18 mm 

  • We recommend choosing the strap button first to match the size of the existing hole in the guitar.
  •  If the hole is too big or too small, please choose a different strap button or reduce / close / re-drill or extend the hole.
  • If necessary, countersink separately in the area of the outer lacquer layer to prevent the lacquer from flaking off when screwing in the strap button.
  • Carefully screw in the strap button into the wood and, if it is too tight, unscrew it again and gradually drill up the drill hole.
  • If the strap button is too easy to screw in, then reduce or close the hole and drill again appropriately.
  • Tighten the strap button "hand-tight" to the instrument body. Do not continue by force. The wood may break, flake off the paint and tear off the strap button.

Please check the secure fit of the strap button in the wood regularly and retighten the screw if necessary or reduce or close an enlarged hole as described and re-drill.


2.) Assembly of the locks on the belt

Insert the lock through the hole in the strap. The lock is on the inside of your belt and the threaded hole for the lock-wheel on the outside. The open side of the lock (U-shape) points in each direction to the belt, so that the instrument can later safely hang in the lock.

If the hole in the belt is too narrow or there is only one slot in the belt, please cut away a piece of the belt in a circle (10mm) so that the thread can be easily pushed through the lock without the leather parts standing upright. Otherwise, the lock wheel can not be securely fastened and the lock and lock wheel can disengage.


If necessary, punch a hole of 10mm in the leather strap with a punch, then our S-Lock lock fits exactly through the leather strap and our lock wheel can be optimally screwed on and locked.


3.) Installation of the Lock-Wheels (3-stage safety concept)


Turn the lock-wheel clockwise onto the thread of the lock. The flat side must point to the belt; the rounded side up! Make sure that the small set screw in the lock-wheel is not screwed inwards and destroys the thread.



Use a 2mm/ 5/64’’ Allen key or small screwdriver through the 2-hole mount for an even tighter fit of the lock-wheel for maximum grip.



Screw in the set screw with a cone tip and slot 2.5x5mm with a screwdriver until it stops. This will lock the thread and the lock wheel will not release.


Please use the Allen key or thin screwdriver to tighten the lock wheel very firmly (level 2) before screwing in the micro screw (level 3).

This gives the lock a firm hold and the 3 tapered pins on the inside of the lock penetrate the leather belt and prevent the lock from twisting.


With a very thick leather strap, the lock may twist, despite the three pins on the lock that are pressed into the strap to prevent rotation.

To avoid this, please make sure that

1.) you have a circular hole in the belt and, if necessary, punch out what exactly corresponds to the diameter of the threaded neck of the lock;

2.) press the leather strap as tightly as possible in the area of ​​the lock and lock wheels in advance so that you can then tighten the lock wheel more easily and firmly on the lock;

3.) from time to time you tighten the lock wheel again and again until the leather strap is maximally compressed at this point.

Always loosen the micro screw beforehand so as not to destroy the thread.


Check the secure seating of the set screw regularly and retighten the set screw if necessary.

To unscrew the lock-wheel, simply loosen the set screw; the thread remains functional, it cuts through the lock-wheel again "free".

Before loosening or retightening the lock-wheel, always first unscrew the set screw so that it does not stand inward and the thread is damaged!


4.) Function of the S-Locks

Pull the lock over the strap button without pulling the ball upwards until the lock clicks into place and the bolt lowers into the strap button.

The instrument hangs in the U-shaped lock and is thereby held securely.

Check the secure fit. To do this, try to pull the lock without pulling the ball from the strap button. The lock must remain engaged and must not be pulled down by the strap button. The ball must sit on top of the thread.

To release the lock, pull the ball and pull the lock sideways away from the open side of the lock.

Check all parts regularly for possible wear.

Retighten all screws in a timely manner.

When playing, always check the secure fit of the lock on the belt, the locking of the lock in the strap button as well as the secure screw connection of the strap button in the instrument.

Please always make sure that the lock is engaged in the strap button, the lock is attached to the belt in such a way that the strap button is secured in the U-shape of the lock and that the instrument does not rotate.

Between the thread of the lock and the pull-up ball must be a thin gap. This is sign that the locking bolt touch the ground at the strap button before the pull-up ball touch the threaded body of the lock. This gives you confidence that the locking bolt is maximum inside the strap button.

For reasons of simplification, we only show the picture in nickel for the replacement kits.

Please select the desired color using the configurator. You will then receive the desired product in this selected color, even if the product is only shown as nickel in the picture.



technical drawings (without engagement)


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