Frame is malleable iron, with black finish. Instead of ball bearing the trust on spindle is taken by a hardened steel bearing in lower and of frame, and so arranged that any wear can be readily taken up. Spindle is of steel. Gears with cut teeth, large gear, 3 in., small gear, 7/8 in diameter. The crank is 2-3/4 in. long.

Polished hardwood handle, 4 in. long, 1-1/2 in. diameter. Can be detached from frame by milled nut to use interior of handle as a magazine for drills.

Chuck body is of steel polished and nickel plated. 1-3/8 in. long, 1 in. diameter. The three jaws are of tool steel. Chuck holds round shanks only up to 3/16 in. diameter.