The Performance Tool W741C hacksaw blades are made of high carbon steel, providing superior strength and durability. This set includes two 18 teeth per inch x 12" length blades and two 24 teeth per inch x 12" length blades, providing options for different cutting needs. The 18 TPI blades are perfect for cutting through thicker materials, while the 24 TPI blades are ideal for more delicate cuts that require precision. These hacksaw blades are easy to install and can be quickly and securely attached to a compatible hacksaw frame, making blade changes a breeze. Suitable for cutting through metal, plastic, and other materials, the Performance Tool W741C hacksaw blades are a versatile addition to any toolkit.