The Bi-Polar 3 (BP-3) dual assisted knife with twin blades, uses S.A.T., each blade is propelled out once the operator has initiated the blade opening action. Dual blades, double lockbars and twin safeties work to lock the blades closed or double lock the blades open. The 5.7-ounce knife is 7.5 inches long with a 3-inch by 0.120-inch blade of a satin polished AUS8 stainless steel.