RCBS Trim Pro-2 Shell Holder Conversion Spring Loaded. This Shell Holder from RCBS Gear securely locks the case in alignment with the pilot and cutter. The "universal" shell holder on the RCBS Trim Pro-2 Bullet Shell Holder Conversion will accommodate case head diameters from .250" to .625" rims. Case fit is from the 5.7x28 to the long range .338 Lapua Magnum or heavy hitting .45-70 Government. NOTE: Not for use with older Rotary Case Trimmer or Rotary Case Trimmer -2 collet style trimmers. RCBS Limited Lifetime Warranty. For a great way to save money by reloading your used or spent bullet casings choose the RCBS TRIM PRO-2 SHELL HOLDER CONVERSION. Specifications for RCBS Trim Pro-2 Shell Holder Conversion: Manufacturer: RCBS Quantity: 1 Color: Black Country of Origin: USA Features of RCBS Trim Pro-2 Shell Holder Conversion Upgrades the Trim Pro trimmer Eliminates the need to purchase additional Trim Pro Shell Holders High-quality and durable construction Package Contents: RCBS Trim Pro-2 Shell Holder Conversion RCBS 90368: Trim Pro-2 Shell Holder Conversion Spring Loaded