The Cornwell Flex Ratcheting Combination Box Wrench Sets, Nos. CRW8SFA and CRW12MSFA, contain tools with a multi-drive, 12-point design that can be used on 6-point, 12-point, square, Torx, spline and rounded fasteners. The CRW8SFA is an 8-pc SAE set with 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16" and 3/4" wrenches. The CRW12MSFA is a 12-pc metric set has 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm and 19mm tools. The sets are housed in "hinge and snap" blow molded trays that snap together with other Cornwell tool cases.