3/8" Drive x 17mm Deep Universal GRE1017UMD Sanding Boards Includes 6 pieces in sizes

Includes 6 pieces in sizes 3/4" to 1-3/8"

72 tooth ratchet mechanism

1" stainless steel band with special "teeth" grips tightly

Chisel rotates to line up parallel to bolt

Aluminum Body

3/8" Drive x 17mm Deep Universal GRE1017UMD Sanding Boards Includes 6 pieces in sizes3 8" Drive x 17mm Deep Universal Features and Benefits: Made of high quality steel (chrome molybdenum) Engineered specifically for use with impact tools, using the most up to date industrial specifications Made to transfer the pressure from the thinnest part of the socket wall toward the thicker section, resulting in increased strength Lifetime warranty This impact, deep socket features high torque drive, which limits the amount of wear on the corners