The Shark Classic Silicone Strap, made of soft and supple high grade silicone is more durable and fade resistant than polyurethane and has increased flexibility for an improved fit. Available in many colors with contrasting keepers, it can bring an exciting upgrade to your existing watch or allow you to create a design of your own to fit your personality or mood. Mix and match other straps and keepers to create a one-of-a-kind Shark! All Strap Kits include the complete strap with buckle and keeper, as well as two spare spring bars (or screw bars) for attaching the strap. Spring bar strap tool sold separately, or just use a small jeweler’s screwdriver to install.