These High Carbon Steel blades have a fine tooth design and are excellent for undercutting wood door jambs, and plastic up to 1-5/8″ thick. Blades have an offset mounting flange for flush cutting and can cut all the way into corners. The StarlockPlus mount offers fast, secure, tool-less blade changes — in under 3 seconds — and power transfer due to the 3D tool mount. Blades are extremely rigid for precise cutting results. StarlockPlus Blades will fit the Fein MultiTalent, MultiMaster, SuperCut and some Bosch Tools. Not for cutting metal, making plunge cuts or where nails, staples or cleats are present.