Buy Qatalitic Detail Pen Knife - Crafts Steel Knife Cutter Tool with 5 Interchangeable Sharp Blades from Amazon. The detail knife with interchangeable blade is ideal for cutting intricate details on paper, cloth, cardboard, thermocol, plastic, wood carvings and lightweight craft materials.Perfect for hobbyists, crafters, artists, fly fishing, first aid kits, auto tint installers, vinyl installation, and more. Shop now