The wooden handle unscrews from the brass base, in case you ever need to brush-clean (use no water) the insides. The brass base has several pieces that fit inside it: the concave disk, which is attached to a long steel screw, a brass tube that fits around the screw, and a spring. 1.25 in. round cutter, 3.75 in. tall. Spring-loaded insert retracts 0.75 in. Solid brass and wood.