Feature:1. Metal ruler and adjustable hole distance make the positioning much easier, thus ensure more precise punching.2. The great paper capacity up to 70 sheets will largely improve the efficiency, and saves your labour as well.3. Sturdy structure and good material bring extra stability in paper punching while protecting the table.4. Simple operation allows for simple punching. Moreover, it's also very easy to change the knives for better use.5. The protector on the knives will extends knives' serving life, and the good material is very durable for long-term use.Specification:Item Type: 2 Hole PunchProduct Material: ABS + Plastic + IronCapacity: 70 SheetDepth of Paper: Approx. 12mm / 0.5inHole Distance: Approx. 70mm/2.8in, 80mm/3.1inHole Diameter: Approx. 6mm/0.2in How to Use: 1. Insert the ruler into the right position; 2. Push paper to the end and keep the paper level; 3. Fix the paper and press the handle to punch; 4. OPen the collector under the bottom and dump the litter; How to Change the Knife: 1. Open the buckle and pull out the bolts; 2. Pull out the knives in the bolts; 3. Exchange the Knives;4. Plug the bolts and close the buckle. .Package List:1 x 2 Hole Punch (Including Plastic Mat)1 x Packing Rope 1 x Ruler