PacTool 42253 Replacement Blades REPLACEMENT BLADES - the original blades for the SS204 and SS404 Snapper Shear models SOLID STEEL - Machined from durable, solid tool steel REVERSIBLE - Side blades can be rotated and flipped to cut up to 20,000 running feet, enough for 15 average homes EASY TO INSTALL - Simply remove cap screws from shear head, install blades, then re-install screws DUST-FREE - Cuts through 5/16" thick fiber cement siding