1Metal ruler and adjustable hole distance make the positioning much easier, thus ensure more precise punching. 2The great paper capacity up to 70 sheets will largely improve the efficiency, and saves your labour as well. 3Sturdy structure and good material bring extra stability in paper punching while protecting the table. 4Simple operation allows for simple punching. Moreover, it's also very easy to change the knives for better use. 5The protector on the knives will extends knives' serving life, and the good material is very durable for long-term use. Item Type: 2 Hole Punch Product Material: ABS + Plastic + Iron Capacity: 70 Sheet Depth of Paper: Approx. 12mm / 0.5in Hole Distance: Approx. 70mm/2.8in, 80mm/3.1in Hole Diameter: Approx. 6mm/0.2inHow 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. 1 x 2 Hole Punch (Including Plastic Mat) 1 x Packing Rope 1 x Ruler