1/2" ratchet: 72T, 255 mm. 3/8" ratchet: 72T, 200mm. Socket wrenches, as well as the socket drive, are made of durable, tool steel. 1/4" ratchet: 72T, 155mm. Single Socket and Ratchets. The ratchets have a three-component handle and 72 teeth (working stroke 5 degrees).
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