Shark Blades Heavy Duty Ultra Reciprocating Saw Blade S1140HM Sabre Blade These S1140Hm reciprocating sabre saw blades by Shark Blades are designed to cut a large range of materials such as: Red brick, aerated concrete, fibre cement, fibre reinforced plastics/epoxy, metals that are 6-175mm thick, sheet metal, nail embedded woods and most wooden materials. The reciprocating blade has 6TPI (teeth per inch) and a tooth pitch of 4.3mm which is designed for cutting a thickness of 4-12mm and has a working length of 205mm. SPECS: Total Reciprocating saw blade length. 228mm (9") Made from. &n.