Milwaukee 48-20-4125 Spline Bit 2-Cutter 1-1/4 in. x 16 in. Since its founding in 1924, Milwaukee has focused on a single vision: to produce the best heavy-duty electric power tools and accessories available to professional user. Today, the Milwaukee name stands for the highest quality, durable and reliable professional tools money can buy. Two Cutter Spline Bits have a series of 12 spline that slide into an equal but opposite set of Spline in the drive system of the Spline Drive Hammer. This positive engagement of Spline to Spline allows maximum transmission of energy from the Hammer to the Bit. Superior quality carbide nibs are vacuum brazed to a heat treated steel body resulting in two cutting edges which pulverize the concrete as the bit turns and pounds the work surface. Available from 3/8 inch to 1-1/2 inch diameters as well as metric diameters. One per package. Milwaukee 48-20-4125 Spline Bit 2-Cutter 1-1/4 in. x 16 in. Features: 1-1/4 in. diameter, 2-cutter head Spline shank Drilling depth 10 in. Overall length 16 in.