The Lyman Gas Check Seater is the perfect device to achieve consistent square seating of gas checks. This patented device was designed to work on the Lyman 450 Lube Sizer and the RCBS Lube-A-Matic Sizer/Lubricator. Will work with any manufacturers gas checks.
Fits: Lyman 450 Lube Sizer, RCBS Lube-A-Matic Sizer/Lubricator
Notes: Will work with any manufacturers gas checks