Proto J5854 Socket Adapter 3 4 in Output Drive Size, Square, 2 7 8 in Overall Lg, Chrome, Locking G0099620 The heavy duty series offers The heavy duty series offers great durability for long lasting use TOUGH CASE(R) Container Primary Material Application ISO Code O Number of Drill Bits 21 Shank Type Machining Straight Web Construction Tapered Drill Bit Case Type Box Impact Rating No Drill Bit Point Type Conventional Standards Not Rated Material Grade Machining General Purpose Package Quantity 1 Ratchets Item Extension Locking Yes Standards ASME B107 SAE AS4984A Impact Rated No Output Drive Type Male Square Material Alloy Steel Measurement Type SAE Number of Points 4 Output Drive Gender Male Input Drive Gender Female Insulated No Output Drive Shape Square Input Drive Shape Square Non Sparking No Corrosion Resistant Yes Drive Size 1" Overall Length 2 7 8 in Output Drive Size 3 4" Input Drive Size 1 in