The Shuttle T-Lock delivers field point accuracy and cuts tremendous entry and exit holes. The T-Lock Technology locks the blades to the ferrule and guarantees blade retention. The cut-on-contact stainless steel ferrule and blades deliver superior strength. The stainless steel non-vented blades are ultra-strong, quiet, and are scalpel sharp. Both models have a blade thickness of 0.041 at the base of the blade.