Other Utilities Cutter Olfa Model : AK-4 Suggested Uses : Ideal for use in arts, graphics, crafts and hobbies for both consumer and industrial applications. Applicable Spare Blade : - KB - KB4-F - KB4-S - KB4-R - KB4-NS - KB4-WS Professional art knife featuring ComfortGrip handle and quick-spin blade changing, perfectly balanced design and an anti-roll device. Package includes ( 2) precision blades, ( 1) chisel blade and ( 1) curved carving blade.