Attach a CenterFire SuperShear Blade to your corded or cordless SuperShear for quick and easy trimming of spray foam insulation Choose between an Open Cell or Closed Cell Blade to suit your needs The Open Cell Blade effortlessly passes through open cell foam insulation without causing cling, and can be reversed for a sharp cutting edge The Closed Cell Blade aggressively cuts through closed cell insulation in one smooth motion Both blades are lightweight and offset from the handle for a comfortable grip and cleaner cuts