The A. Richard Wall Scraper - Stiff (S-4 -S) is equipped with stiff high-carbon carbon steel blades that are 0.05" to 0.065" thick. The full tang blades are heat-treated, tempered, ground, mirror-polished, and lacquer-sealed, which makes the blade hard and flexible, offering reliable, durable, quality workmanship. There is also a flexible taping knife blade that is hollow ground on both sides and a polypropylene, solvent-resistant handle. It's ideal tool to scrapes old putty, paint and varnish.