Schaller S-Locks M - Black

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.

Final
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:

Strap Buttons size S: male thread 3.5 mm, inside 2.4 mm, length 18 mm
Strap Buttons size M: male 4.0 mm, inside 3.0 mm, length 22 mm - most commonly used
Strap Button size L: male 4.5 mm, inside 3.2 mm, length 27 mm