The Lee 45/70 Government Collet Neck Sizing Die uses a collar to compress the case neck against a precision chuck, creating a precisely aligned case neck while reducing runout. It only measures the neck of the case and does not require lubrication of the case. Integrated Breech Lock quick-change thread on the outside of the die body, works with any Lee Breech Lock enabled refill press. Gross weight: 410 grams. Made in the USA.