The Klein Tools 16-Piece Long Hex Bit Socket Set features SAE and metric sizes from 5/32-Inch to 1/2-Inch and 4 mm to 12 mm, with long hex bits for extra clearance in tight spaces. Knurling on the socket base ensures a strong grip for hand-starting fasteners, while bold stamped size markings allow for quick identification. The included MODbox™ accessory case is stackable and MODbox™ compatible, offering seamless storage and organization.