Westward 21WL67 Impact Socket Bit Features These hex impact socket bits come with a hex bit on one end that fits the hexagonal-shaped indentation in the fastener head. Measurement Type / SAE Drive Size / 3/4 inch Overall Length / 3-1/2 inch Tip Size / 1-1/4 inch Tip Style / Hex Replaceable Insert / No Material / Alloy Steel Finish / Black Oxide Impact Rated / Yes Bit Length / 1-1/4 inch Drive Type / Impact Insulated / No Locking / No Magnetized Tip / No Socket Depth / Short Socket Size / 3/4 inch Standards / ASME B107.110