This compact 38 piece screwdriver bit set contains a deceptively strong zyklop mini bit ratchet with a fine tooth and reversible ratchet mechanism capable of taking 100nm of torque this really could be the strongest mini bit ratchet on the market ideal for access in tight spaces needing only 27mm clearance when using a 25mm screwdriver bit a grooved thumbwheel allows even greater versatility if there is no space to ratchet also included is a huge range of high quality screwdriver bits in hex