Redding Primer Pocket Uniformers are precision ground carbide tools designed to cut primer pockets to a uniform depth and square to the case head. The depth of cut is to SAAMI specifications and is controlled by a shoulder ground into the cutter that cannot change. Available for large and small rifle primer pockets. Each cutter is supplied with an integral holder having a #8-32 threaded shank to fit the Redding #18005 accessory handle. Note: Small Rifle Primer Pocket Uniformer is dimensionally correct for small pistol. Do not use the Large Rifle Primer Pocket Uniformer for Large Pistol.