Redding Primer Pocket Uniformers are precision ground carbide tools with five cutting flutes for smooth, flat uniforming of the bottom of the primer pocket. The shoulder ground in the carbide tool bit holds the depth of cut constant and to SAAMI specifications. Uniformers are available for large rifle pockets and small rifle/small pistol pockets. Each uniformer comes in a kit with the uniformer bit, a Redding accessory handle and a one fourth inch hex power screwdriver adapter. Mfg: Redding