Turn any of L.E. Wilson's precision Chamber Type Seaters into a micrometer adjustable die. Just remove the standard Bullet Seater cap and thread your Micrometer 303/416 Stainless material Precision cut 40 TPI for a fine adjustment of bullet seating depth Adjust in .001 increments with .025 per full rotation - easier to dial in seating depth Accepts all calibers of Seating stems (Drifts) 17 to 35 cal Turn any of our precision Chamber Type Seaters into a micrometer adjustable die. Just remove the standard Bullet Seater cap and thread your Micrometer cap on adjust set screw and that's it. Compact design - about the same height as our standard cap that is supplied with the die Laser etched lettering and scale MADE IN THE USA!