The Chadwick & Trefethen ‘D’ Adjustable Reamer is a choke-reaming tool from Chadwick & Trefethen, built for expandable-choke work and sized to the D position in their lettered reamer lineup. As with the other sizes in the series, it’s used to cut a shotgun barrel’s choke constriction to a different, typically more open, pattern during an expandable choke conversion or repair. A matching blade set is sold separately for when the reamer’s cutting edges eventually wear down. It’s a specialty gunsmithing tool for shooters and shops taking on dedicated choke modification work.

Key Specifications

• D-position sizing in Chadwick & Trefethen’s lettered adjustable reamer lineup.
• Expandable choke reaming function lets a gunsmith open a shotgun barrel’s fixed choke to a different constriction.

Frequently Asked Questions

What is this reamer used for? Cutting a shotgun barrel’s choke constriction as part of expandable-choke conversion or repair work.

Can the cutting blades be replaced? Yes, a matching ‘D’ blade set is sold separately for when the original edges wear down.

Buy the Chadwick & Trefethen ‘D’ Adjustable Choke Reamer

Add this reamer to your gunsmithing tool kit, shipped fast from our Lubbock, Texas gun shop.