The Speartooth blades are best for wood, PVC and drywall applications. The coarse tooth design is best for framing and construction projects where fast, aggressive cuts are best. The One Fit anchor fits majority of non-Starlock multi-tools. The bend in the anchor allows for flush cuts which are useful on flooring, doorjambs, window sills, wall trim and more. No other tool makes flush cuts as quickly and easily as an oscillating tool.