6-1/2 oz., solid, 1″ diameter head, 8-1/4″ (21.0 cm Hajek Bone Mallet is a uniquely crafted instrument for use in a wide variety of neurosurgical procedures. This mallet features a solid dumbbell style head one inch in diameter that is narrower in the center and flares out on either end. Additionally the slim neck and rounded handle making this mallet easy to handle and well suited for delivering little bursts of force to drive a chisel down the center of a bone to split it or to chip away at particular portions of bone.