Socket Bit, Replaceable Insert No, SAE, Tip Size 1/2 in, Tip Style Slotted/ OVERALL LENGTH: 3.500 INCHES NOMINAL TIP WIDTH: 0.500 INCHES NOMINAL DRIVE SURFACE SIZE: 0.500 INCHES NOMINAL SINGLE END TIP THICKNESS: 0.075 INCHES NOMINAL FEATURES PROVIDED: MANUAL TOOL WRENCHING SURFACE SHAPE: FLAT (SLOTTED) SINGLE END EXTERNAL MATERIAL: STEEL OVERALL STYLE DESIGNATOR: 187A FLAT