SklarSafe Sterile Safety Scalpel, Sklar, #15, The SklarSafe Sterile Safety Scalpel #15 features a protective, transparent sheath that can be opened, closed and locked with a single hand. The sturdy, in.sure-grip in. handle provides an audible in.click in. when the sheath is advanced to a locked position. This instrument is OSHA compliant and individually sealed in sturdy film and Tyvek pack. Safety scalpels are available in a box of 10.