18-piece tool set for the bike workshop. With the Zyklop Mini bit ratchet and the bitholding screwdriver and the 89 mm and 25 mm length bits, hexagonal socket, TORX® and Phillips-head Phillips screws can be operated. With the included chain riveter and chain fastener with exchangeable rivet pin, bicycle chains can be opened and closed (suitable for single-speed chains, up to 12-speed). The chain lock tool makes it easier to open and close chains with a chain lock.