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. Pieces qty. 5, SAE Sizes in. 3/8, 7/16, 1/2, 9/16, 5/8, Combination Type Open/boxed, Material Type Chrome vanadium steel, Measurement Type Standard SAE, Point Size qty. 12, Finish Type Mirror, Flex Head No, Ratchet Head Yes, both ends.