Inovart's unique "Quick Release" system allows artists to quickly and easily change blades on this lino cutter by simply pulling up on the chuck of the handle. A new blade can be inserted the same way, yet the blade remains secure while working. - Inovart Quick Release Cutter Handle with 5 BladesInovart Quick Release Lino Cutter, HANDLE W/5 BLADES - This set includes a Quick Release handle and five blades, including a No. 1 small U-shaped Gouge, a No. 2 small V-shaped Gouge, a No. 3 large V-shaped Gouge, a No. 5 large U-shaped Gouge, and a #6 Knife.