L.E. Wilson P&B Base Only 610. Bases are case hardened for wear resistance. Specifications for L.E. Wilson P&B Base Only: Manufacturer: L.E. Wilson Color: Silver Features of L.E. Wilson P&B Base Only Punch Out Primers on your Cases in a Separate Operation Works Great for Military Primers Many Precision Shooters Prefer to Punch Primers Out Prior to Sizing To Determine the Correct Size Simply Measure your Case Head Diameter. For example a 223 Remington head measures .375" so you would need a .380 Base Package Contents: L.E. Wilson P&B Base Only L.E. Wilson PBB-610: P&B Base Only 610