Ultra Range S2243HM Masonry Cutting Blade. This Reciprocating Sabre Saw Blade is a hard metal (HM), long-life, straight-cut, tungsten carbide tip (TCT) blade that is designed for making fast, coarse cuts in large brick, red brick, fibre cement, aerated concrete and proton up to 365mm thick. The reciprocating blade is designed to reduce the amount of dust that is created and has weight optimisation for lower vibration levels. Total length 457mm Blade thickness 1.5mm Teeth thickness 2.5mm 2 teeth per inch Shank 1/2" universal These blades are from Shark Blades Ultra Range which is designed for the Professional DIYer or Pro Tradesman for extra performance and longevity. Designed in the UK for optimum performance.