"GearWrench innovative design features ratcheting action in both open and box end of combination wrench Spring-loaded pin in open end recesses into the head, allowing wrench to glide around fastener. Box end needs as little as 5 to ratchet around fastener. Constructed of chrome vanadium steel with mirror finish for corrosion resistance and long-lasting durability. Measurement Type Standard SAE, Finish Type Mirror, Flex Head No, Pieces qty. 5, SAE Sizes in. 3/8-5/8, Material Type Chrome vanadium."