The exclusive design of Klein Tool's 1571-INS features dual-layer insulation for safety. The high-dielectric white inner layer is bonded to the tool while the outer orange layer is flame retardant and serves as a visual warning if the tool has been compromised. The insulated handle is molded for comfort and also features marks on the back to help measure the stripping length of wire. The blade is made of stainless steel for durability and corrosion resistance.