This was the largest ratchet/bit sets on the market. The bits are all made from S2 tool steel and the ratchets are jewels of precision workmanship. The ratchet uses a sprague clutch system. Holding a bit it is only 20m high. The real value is hidden within this set because it includes an 8 pcs set of the new 5†point tamper proof torx security fastener, as well as tradition tamper proof bits, torx bits, phillips and straight bits. This is the master set for any field technician/service professional.