The Black Diamond Folding Hex Key Set is a 3-piece folding set that keeps SAE, metric, and Torx keys organized in compact handles for quick access on the job or in the shop. It includes SAE sizes 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, and 1/4, metric sizes 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, and 8mm, plus Torx sizes T9, T10, T15, T20, T25, T27, T30, and T40L. Built with a black oxide finish to resist rust and corrosion, it meets or exceeds ANSI standards and is designed to resist rotational distortion for dependable performance. Chamfered ends help guide keys into the fastener, and the keys rotate 270° to improve access and deliver solid torque in tight or awkward spaces.