Master your jobs with speed and accuracy with the Greenlee 1" Conduit Size Knockout Die (catalog number KD-1). Designed for plumbing experts, this versatile die tool makes it quick and easy to create clean, precision holes in conduit up to 1" (1.36" or 34.6 mm.) in size for a superior performance every time. Its optimized for use in a wide range of material including mild steel, stainless steel, brass, copper, aluminum, fiberglass, and plastics, and it can be used with Greenlee battery-hydraulic knockout drivers, manual-hydraulic knockout drivers, or ratchet wrenches as well as Greenlee punches and draw studs. For additional convenience on the jobsite, the die is designed with user-friendly features including laser markings so you can quickly identify the part needed and alignment markings for optimal accuracy. Additionally, this knockout die is constructed from durable, rugged materials to withstand years of heavy-duty use on the jobsite for a long tool life. Greenlee: Professional. Nothing Less.™