veterinary scalpel :It's made of stainless steel with blue plastic cover 1,good quality and won't rust. 2,Very sharp. veterinary scalpel #11(40pcs/box) It's made of stainless steel with blue plastic coverThe Scalpel Blades is made from Stainless steel with plastic shell:1,good quality and won't rust .2,Very sharp . Pocket scalpel #11