Butterfly Comb Practice Trainer Training Knife/5 Item/lowest Price This is a Harmless training Butterfly Comb Practice tool.Enjoy and have fun! There are 5 pieces [item] about this production: Comb, blade, screw, screw driver and sheath as showing on the picture! You can practice the comb first to improve his/her flipping skills if you are a newer butterfly knife lover before you play with a real knife which is attached with order. You also can fix take apart this tool use the screw/screw driver which is attached with order.