
Availability: In Stock
The Forster Trimmer Collet for Original Case Trimmer #4 is the precision holding component that makes the Forster case trimmer system work. If you're doing serious handloading—whether you're trimming rifle or pistol brass to exact lengths, reaming necks, or managing military primer pockets—this collet is what grips your case securely while you work. It uses a Brown and Sharpe type collet design, the kind of accuracy you'd expect from a reloading tool built to hold tight tolerances shot after shot.
This collet pairs with a pilot (sold separately) to support and center your case neck during trimming operations. The collet itself is the critical clamping element—it's what holds your brass stable whether you're running the trimmer by hand or powering it up with a drill or power screwdriver using the optional Forster Power Adapter. Reloaders who've invested in the Original Case Trimmer #4 and need a replacement collet, or who are building out a complete trimming setup, will find this is the genuine Forster part that delivers the precision fit the system was designed around.
Forster's trimmer system is known for its versatility across multiple case-prep tasks—trimming case length, hollow pointing, neck turning, inside neck reaming, case mouth deburring, and primer pocket reaming—but all of that capability depends on a solid, accurate collet holding your brass. This is it.
| Product Type | Case Trimmer Collet |
| Brand | Forster |
| Collet Type | Brown and Sharpe type |
| Compatibility | Forster Original Case Trimmer #4 |
| Requires | Pilot (sold separately) |
The collet works with Forster trimmer pilots, which are sold separately. The correct pilot depends on your specific caliber and case type—check the Forster pilot listing for your cartridge.
Yes. The Original Case Trimmer #4 and this collet can be powered with a drill or power screwdriver if you add the Forster Power Adapter (#FPA1000), sold separately.
This collet is sold as a replacement part for the Original Case Trimmer #4. If your existing collet is no longer holding cases securely, this is the part to swap in.
When paired with the Original Case Trimmer #4, this collet supports case length trimming, hollow pointing, neck turning, inside neck reaming, case mouth deburring, and primer pocket reaming—including removal of military crimps.

SKU: 197558139 • Weight: 0.07oz





Availability: In Stock
The Forster Trimmer Collet for Original Case Trimmer #4 is the precision holding component that makes the Forster case trimmer system work. If you're doing serious handloading—whether you're trimming rifle or pistol brass to exact lengths, reaming necks, or managing military primer pockets—this collet is what grips your case securely while you work. It uses a Brown and Sharpe type collet design, the kind of accuracy you'd expect from a reloading tool built to hold tight tolerances shot after shot.
This collet pairs with a pilot (sold separately) to support and center your case neck during trimming operations. The collet itself is the critical clamping element—it's what holds your brass stable whether you're running the trimmer by hand or powering it up with a drill or power screwdriver using the optional Forster Power Adapter. Reloaders who've invested in the Original Case Trimmer #4 and need a replacement collet, or who are building out a complete trimming setup, will find this is the genuine Forster part that delivers the precision fit the system was designed around.
Forster's trimmer system is known for its versatility across multiple case-prep tasks—trimming case length, hollow pointing, neck turning, inside neck reaming, case mouth deburring, and primer pocket reaming—but all of that capability depends on a solid, accurate collet holding your brass. This is it.
| Product Type | Case Trimmer Collet |
| Brand | Forster |
| Collet Type | Brown and Sharpe type |
| Compatibility | Forster Original Case Trimmer #4 |
| Requires | Pilot (sold separately) |
The collet works with Forster trimmer pilots, which are sold separately. The correct pilot depends on your specific caliber and case type—check the Forster pilot listing for your cartridge.
Yes. The Original Case Trimmer #4 and this collet can be powered with a drill or power screwdriver if you add the Forster Power Adapter (#FPA1000), sold separately.
This collet is sold as a replacement part for the Original Case Trimmer #4. If your existing collet is no longer holding cases securely, this is the part to swap in.
When paired with the Original Case Trimmer #4, this collet supports case length trimming, hollow pointing, neck turning, inside neck reaming, case mouth deburring, and primer pocket reaming—including removal of military crimps.
SKU: 197558139 • Weight: 0.07oz
