Diablo's Starlock high carbon steel oscillating sealant removal blade delivers high-performance removal and cutting of soft materials such as flexible joint sealer, window putty, and caulk. The unique design of the blade body allows for effortless cutting on both sides of the blade and easy access in hard-to-reach areas. The tool-free, quick-change interface fits Fein and other Starlock tools; also compatible with most non-Starlock multi-tools.