·Chrome vanadium steel construction, Internally by 54pcs,

·Alloy steel hardness pole constituted Fits standard,

·1/4 to 3/4-inch and metric 7-19mm nuts and bolt heads.

·Comes with a 3/8" power drill adapter, turn your drill to,

·socket driver and 3/8" 45T carbon steel ratchet handle.

·Self-adjusts to fit grasp the hex, nut, eye, hook etc.makes your work easier.

·Specifications :Compatible Fastener Range： 1/4" - 3/4".