Durable ergonomic safety knife Manufactured from acid and acetone-resistant Nylon 6 Polyamide this safety knife is designed for long-lasting durability in demanding environments. For enhanced user comfort and control it features an integrated thumb rest and anti-slip grip indents. The knife incorporates a concealed blade packaging cutter with a built-in tape slitter allowing users to safely cut a wide range of packaging materials including shrink wrap plastic strapping tape and cardboard boxes. When the blade becomes worn simply open the blade cover and carefully snap off the used blade segment along the designated notch to reveal a fresh sharp cutting edge. Each blade provides up to four usable cutting edges helping to extend blade life and reduce replacement frequency.