It punches up to 10 sheets, has a binding slot, which aids in the inserting of coil for a faster and more efficient bind. The RubiCoil also has a "U" shaped handle for maximizing punching strength, has hardened steel dies for clean and precise punching every time even when punching PVC, Polyester and Paper. The RubiCoil is made for a small volume of work. It's chief advantages are its small size and its small cost. The RubiCoil will do a good job for what it was made to do. If your needs are for coil binding books less than 100 sheets and no more than a few copies at a time this may be the coil binding machine for you. It punches up to 10 sheets, has a binding slot, which aids in the inserting of coil for a faster and more efficient bind. The RubiCoil also has a "U" shaped handle for maximizing punching strength, has hardened steel dies for clean and precise punching every time even when punching PVC, Polyester and Paper. The RubiCoil is made for a small volume of work. It's chief advantages are its small size and its small cost. The RubiCoil will do a good job for what it was made to do. If your needs are for coil binding books less than 100 sheets and no more than a few copies at a time this may be the coil binding machine for you. One Year Warranty.