Model HC-450 is engineered for continuous 1/4" to 4 3/4" hole cutting in and up to 8" in-place on unpressurized pipe. Dual-side feed handles and switches provide easier operation from any angle. In addition, the HC-450's heavy duty chuck accommodates 1/8" to 5/8" arbors. The HC-450 is ideal for mechanical, industrial maintenance, and fire protection contractors as it cuts holes into a wide variety of pipe materials. Specifications Motor: 1.2 HP. Chuck speed: 110 rpm Hole capacity: 1/4~4 3/4" Drill Chuck capacity: 1/8~5/8" Pipe clamping capacity: 1 1/4" to 8" All jobber drills and hole saws available on supply. Integral arbor hole saws recommended over 2" diameter.