Proto Socket Bit Set J4900-7C Hex socket bit sets feature a hexagonal-shaped socket on one end that can be used to tighten and loosen fasteners with matching indentation in their head. Tip Size / 1/4 inch; 1/8 inch; 3/16 inch; 3/8 inch; 5/16 inch; 5/32 inch; 7/32 inch Tip Style / Hex Insert Length / 1-5/8 inch Overall Length / 2-23/32 inch Drive Size / 3/8 inch Number of Pieces / 7 Material / Alloy Steel Finish / Chrome Measurement Type / SAE Insulated / No Impact Rated / No Container Type / None Non-Sparking / No Replaceable Insert / No Tether Ready / No