Innovative Bosch “Speed for Metal” blades offer the fastest cuts and long life in thick or thin metal pipes and metal profiles. A narrow, bi-metal body with strong, aggressive teeth removes stock quickly and leaves a good finish in straight and gently curved cuts. T-shank design for maximum grip and stability that fits more than 90% of all current jig saw makes and models.21 TPI with unique tooth geometry including rigid and aggressive profiles for unrivaled speed in metal cuttingBackward tapered design simulates pendulum motion to increase speedBi-metal construction for durability and extra long lifeProper lubricant is recommended when cutting metal