A single slotted string locking bolt that is used to lock the string on a Kahler 2720 Spyder with a 1/8" allen key, flat screwdriver or coin.
There are 2 types of string locking bolts for Spyders, the old style has a 3/32" allen only end while this newer version has a 1/8" allen and a slot. Your Spyder will have one of these styles.
String Lock Block
