6.3 mm (1/4″) square drive. Socket bits and tools made of CV steel. Ratchet made of chromium-molybdenum-vanadium steel with socket-locking function and push-button release. Matt chrome-platedContents:1 pass-through ratchet with captive square (76 teeth)1 hex socket bit ea. in AF 5, 5.5, 6, 7, 8, 10, 11, 12, 13 mm1 extension with freewheel sleeve, 150 mm1 wobble extension, 56 mm1 connector with quick-change chuck, 6.3 mm (1/4″) internal square to 6.3 mm (1/4″) hexagon socket (for driving bits with a ratchet)1 bit ea. for Phillips (PH) screws in sizes 1, 2, 3*1 bit ea. for pozidriv (PZ) screws in sizes 1, 2* 1 bit ea. for screws with Internal TORX® profile in T 10, T 15, T 20, T 25, T 27, T 30*1 bit ea. for screws with hexagon socket profile in 3, 4, 5, 6 mm** Bit length 25 mmSpecial product advantages of the ratchet:- Sturdy forged solid metal ratchet- Extremely slim, long lever- Fine-toothed