The ergonomic, ultra-lightweight Leatherman Z-Rex was designed with EMTs and first responders in mind. By combining a Carbide glass breaker and a 440C stainless steel strap cutter in one convenient package, Leatherman has eliminated the need for multiple tools, saving critical pocket or belt space. The V-notch strap cutters are forged from 440C stainless steel, which is corrosion-resistant and can keep a sharp edge even when cutting through tough materials like canvas, rope or nylon webbing. The cutters are replaceable for convenience. The glass breaker tool is made from Tungsten Carbide, which reduces the amount of collateral glass splay when breaking windshields or car windows in emergencies. This tool also includes an oxygen tank wrench and 0.25-inch hex bit driver.