27 to 36 HRc hardness. Epoxy resin connection guarantees secure shafting. Resistant fiberglass handle for work in adverse conditions. Bronze-aluminum head prevents material deformations and does not spark on impact. Octagonal design decreases the load and balances the force. New handle design, with shock absorbent guard included. Head Weigth: 18 lb. Face diameter: 3-3/25”. Head length: 8-3/4”. Handle length: 16-7/8”. Total length: 20″.