Burstfire manufactured this Primer Pocket Reamer Set with the highest quality material to ensure long term performance. You will appreciate the clean cuts / performance from these tools. Uniform, even primer pockets ensure reliable primer ignition, and/or prevent the possibility of slam-fire from primer not being seated deep enough. Industry standard 8/32 threads alow these tools to be attached to any prep tool handle, or atop a Case Prep Center. The Burstfire Ultimate Primer Pocket Reamer is the easiest, fastest, and most effective solution on the market! Burstfire redesigned and Improved vs others on the market. Normal reamers cut at 35-40 degree angle, which will require excessive metal to be cut for the crimp to be removed. BFG Reamers 80-85 degree angle, to SAAMI dimensions, and requires minimal cutting. Cut radius for these tools is 0.0025 below standard primer dimensions. For small is 0.1730 and 0.209 for large, compared to 0.167 small and 0.202 large for most other products ...