Model: WireMac-EX21 Pitch:2:1 Operation:Punching - Electric, Wire Closing - Manual Single Punch Capacity:Up to 25 sheets for 20 lbs paper. Up to 2.6mm for hardboard (28-sheet equivalent thickness)* Wire Closing Capacity:3/16" to 1-1/4" * Single Punch Length: 14" with open throat for longer documents Hole Size:Rectangle (4 x 5.5mm) Disengage able Pins All 27 Weight & Dimensions:55 lbs / 19" W x 16" D x 17.5" H Warranty1 Year