S-Locks M

S-Locks M

From €26.20*

Prices incl. VAT plus shipping costs

available, delivery time appr. 1-3 days Germany, 3-5 days Europe, 5-7 days other countries

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S-Locks size M: thread length 22 mm


With Schaller Security Locks, we developed and patented a completely new product in 1981, probably the most secure connection between guitar and strap. In 2018, the next generation was introduced with the S-Locks.

Note: before installation please read the following

Concept and features

S for safe, silent & Schaller strap locks

In the development of the new revolutionary S-Locks we have combined 3 parts to perfection: 
  • unique one-piece hardened steel strap buttons
  • S-Locks suitable for different belt thickness with ergonomic operation
  • and a patented locking nut - Lock-Wheel - with triple security architecture


(Fig. 1: one set of S-Locks complete with strap button)

The S-Locks strap button

  • new and unique one-piece construction, easy to install via 3 mm (1/8") allen key
  • special 4.0 mm wood thread in S-Lock size M for maximum grip. Optionally available in sizes S (3.5 mm) and L (4.5 mm). Please refer to the installation guide above.
  • hardest steel for maximum wear resistance and safety 
  • including high-grade felt washers to protect your instrument

The S-Locks improved lock

  • extended thread length for holding straps of up to 6 mm thickness
  • newly designed slanted locking bolt made of stainless steel for minimum wear and thus maximum safety
  • new design pull-up ball for best haptics
  • suitable for a standard hole in the belt of 10 mm

The improved S-Locks-Wheel: featuring 3-stage safety concept 

  • Lock-Wheel with special patent thread ensures a secure hold. It can be tightened safely by hand without tools.
  • The 2-hole mount (suitable for 2 mm Allen key or screwdriver) allows a firmer tightening torque of the Lock-Wheel with maximum hold.
  • Undetachable hold due to grub screw with tapered cap and slot 2.5 x 5 mm made of stainless steel. Simply unscrew the set screw again to unscrew the Lock-Wheel; the thread remains functional and cuts itself "free" again through the Lock-Wheel.


  • Put all parts together and give it a shake
  • Sounds of silence - You will be amazed: Whether on stage or in the studio, S-Locks do not rattle.

Compatibility Schaller Security Locks and S-Locks

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

  • strap button old SecLock + lock new S-Lock (without silent feature!)
  • 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.

b.) One strap for several instruments

Choose from more matching strap buttons in different lengths here:

Schaller S-Locks: only original in the pictured crystal box


(It can also be used as a sustainable storage container after removal of the protective foam.)

The package contains:

2 x Strap Buttons with high-grade felt washers


2 x Locks

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

 2x Lock-Wheels


Technical drawings