Proto® Super Proto® Standard Screwdriver, Measurement System: Imperial, Keystone/Slotted Point, 3/8 in Point, 14-3/4 in Overall Length, Round Shank, 3/8 in Shank, 10 in Shank Length, Alloy Steel Shank, Specifications Met: ASME B107.15, Tri-Lobe, High Alloy Steel, Full Polished