This Die Wrench is made of 42CrMo alloy steel for unmatched strength, torque, and corrosion resistance. Designed specifically for Lee spline nuts and breech lock bushings, it delivers a secure, non-slip grip that plastic wrenches just can't match. Two ends, twice the utility: Open end – Quick adjustments in tight spaces. Closed end – Maximum leverage for stubborn lock rings. Works smoothly on single-stage presses, Lee 4000, and 6-station presses. The polished finish resists rust and oil, and the ergonomic design feels great in hand.