LYMAN Deluxe Neck Sizer Die with Carbide BTN Trim while the larger diameter is

while the larger diameter is meant to reach the star chamber/ locking lug recess area

Body thickness: 2mm

Accepts Most M4/M16 Pistol Grips

Designed for precision sighting in of rifles and for testing ammo and reloads

LYMAN Deluxe Neck Sizer Die with Carbide BTN Trim while the larger diameter isFeatures a precision machined and hardened die body along with a super hard and slick carbide expander button. The expander button also free floats on the rod to allow it to self center in the case neck and the slick button easily passes through the case neck. The result is a die that will reduce case stretching, increase case life and provide enhanced accuracy for the reloader.