Vaughan & Bushnell's Bear Saw Replacement Blades are durable spring steel, plated for rust resistance. The specially ground, tri-edge teeth are impulse hardened to retain their sharpness. Four easily interchangeable blade styles match any task, from rough cuts to fine woodworking; any blade can be used with either style handle. This model is a double edged blade style. Vaughan Bear Saws are made to cut on the pull rather than on the push stroke. This allows for a thinner blade, which removes less material, making sawing easier, faster and more accurate. Bear Saw blades are durable spring steel, plated for rust resistance. The specially ground, tri-edge teeth are impulse hardened to retain their sharpness. Interchangeable blade styles match any task, from rough cuts to fine woodworking; any blade can be used with either style handle. Blade locks securely in handle, yet saw can be quickly disassembled for convenient toolbox storage. Blade guard protects teeth when saw is stored.