The U.S. Manufactured hollow ground gunsmith screwdrivers are versatile and can be adapted for various other applications. All Forster screwdrivers are produced using premium-grade hardened steel. For extended length specialized buttstock screws Hollow-ground blades with square faces are precisely designed to fit screw slots for optimal torque, ensuring no damage to the screw or chamfered work Constructed from premium-grade steel and meticulously subjected to precision heat treatment processes Each screwdriver is a standalone unit, designed without loose inserts that may slip in or out