Westward Box End Wrench Set 54DG37 These ratcheting box-end wrench sets come with 12 points and have an additional groove on the box end. This makes it easier to connect with the head of the fastener and access it from different angles as compared to a 6-point wrench. The double-end wrenches have a different metric size on each end, which allows them to work on two different-sized fasteners. The ratcheting box ends have a gear mechanism that lets the wrench rotate freely in one direction without removing the head from the fastener, thus saving time and effort. Material / Alloy Steel Finish / Chrome Insulated / No Number of Tools / 7 Range of Head Sizes / 7 mm to 21 mm Head Offset Angle / 25 ° Container Type / Canvas Pouch Measurement Type / Metric Head Size / 7 mm; 8 mm; 9 mm; 10 mm; 11 mm; 12 mm; 13 mm; 14 mm; 15 mm; 16 mm; 17 mm; 18 mm; 19 mm; 21 mm Head Type / Offset Box End Type / 12-Point Box End Tether Style / Tether Capable Nonsparking / No Non-Magnetic / No Corrosion Resistant / Yes Wrench Shape / Straight Wrench Length Style / Standard Ratcheting / Yes Reversing / Yes Number of Points / 12 Single End/Double End / Double End Container Color / Black Handle Type / One Piece Grip Style / Plain Handle Color / Silver