Schaller S-Locks Safety Belt (2 single belt pins, nickel, M screw)

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"). We recommend to select the strap button first according to 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. To do this, carefully turn the strap button into the wood and, if the train is too tight, unscrew it again and drill it up successively. If the strap button can be screwed in too easily, reduce or close the hole and then re-drill.