Swingline Commercial Electric 3 Hole Punch, 20 Sheet Capacity, 3 Hole, 74525 Touch button control gives quick and efficient precision. Up to 20 sheets, 20 lb. paper, 9/32" hole for easy page turns. Dimensions of machine only: 16.5L x 6W x 3.5H inches; with paper guide:16.5L x 6W x 10H inches Heads are not adjustable Precisely engineered for smooth, quiet operation. Swingline 20-Sheet Commercial Electric Punch. Three-hole standard letter size with extra-large 9/32" diameter holes for easy page turning. Effortless touch-button control and exclusive punch technology for crisp, clean cuts. Space-saving vertical feed with paper guide guarantees alignment and punch accuracy. Jam clearing mechanism.