These LENOX Gold Utility Knife Blades have high-speed steel edges with titanium coating for a longer blade life. The shatterproof bi-metal construction allows the LENOX blades to bend and flex without breaking making it easier to cut through tough materials like dry wall insulation flooring and roofing. Make deep cuts by extending the utility blade up to 4 notches beyond the handle. The bi-metal blades fit most standard utility knives. The LENOX Gold 20350-GOLD5C Titanium Edge Utility Blades - 5 pack have a high speed steel edge with titanium coating that keep the blades cutting after others have quit. The patented bi-metal construction allows the blades to bend and flex without breaking. The four notch system allows the blade to extend further. The LENOX Gold Titanium Edge Utility Blades fit all standard utility knives and are great for cutting drywall insulation flooring roofing and more.