Features: These ratcheting combination wrench sets have an open end and a 12-pt. Box end with additional grooves that make it easier to connect with the head of the fastener and connect at more angles for better accessibility compared to a 6-pt. wrench. Combination wrenches have the same SAE (inch) size on each end for use on one specific size fastener. A gear mechanism on the box end allows the wrench to rotate freely in one direction without removing the wrench head from the fastener and repositioning the tool. Material / Alloy Steel Finish / Chrome Number of Tools / 15 Range of Head Sizes / 6 mm to 20 mm Head Offset Angle / 0 Degrees Head Type / Standard Container Type / Pouch Measurement Type / Metric Head Size / 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 6 mm, 7 mm, 8 mm, 9 mm Opening Type / Rounded Opening Angle (Deg.) / 15 Degrees Tether Style / Not Tether Capable Non-Magnetic / No Nonsparking / No Corrosion Resistant / Yes Anti-Slip Design / No Insulated / No Ratcheting / Yes Reversing / No Container Color / Black Box End Type / 12-Point Box End Number of Points / 12 Head Thickness / 0.17 inch to 0.465 inch Minimum. Arc Swing / 5 Degrees Wrench Length Style / Standard Standards / ASME B107.100 Handle Type / One Piece