Boker Optima Knife with Staghorn Handles, BK-113004ST. From the genuine Sanborn Stag handles to the mirror-finish nickel silver bolsters and versatile 440C stainless steel clip blade. A remarkably attractive knife. The blades of the OPTIMA series are quickly and easily interchangeable. They transform the one-part knife into a multifunctional knife with a variety of use options. Closed length: 4.75 (12 cm.) Blade 3.625 (9 cm.) Approximate Weight: 7.7 oz. (220 g.)