The Proto 5/16" 12-point combination wrench features a deep offset box end that minimizes fastener rounding and allows effective use in tight, close-quarter spaces. Built heavy duty for demanding environments, it combines an open end and a 12-point box end in a single tool ideal for industrial and construction equipment applications.
Designed for use with a ratchet wrench, this combination wrench consolidates the most commonly needed wrench styles into one versatile tool. The 12-point geometry provides multiple engagement angles, reducing slippage and increasing efficiency on the job site or in the shop.