Portable 3-hole punch is a perfect fit for most 3-ring binders, complete with clip-in rings, so the hole punch stays put. Punches 1/4" standardized holes. Convenient for use as a ruler as well. Four fun colors mean that you'll find the perfect shade for you; comes in purple, lime, blue and black. Lightweight three-hole punch is a perfect purchase when school supply lists come calling. Sheet Capacity: 6; Operating Method: Manual; Number of Holes: 3; Hole Diameter: 1/4".