Bahco 3940 Series Metal Reciprocating Blades are made from virtually unbreakable, bi-metal Sandflex®. Shaped for fast and aggressive straight cuts but still flexible for narrow cutting. With a slope-shaped nose for various types of cuts in more demanding applications. Heavy Standard (HST) blades have precision ground teeth. The wider body makes it more rigid and has a higher resistance to fracturing and bending, allowing straighter cuts. Standard (ST) blades have coarse precision ground teeth are a series of flexible blades. The standard body makes it more flexible and easier to bend into position.Select Option HST, 150mm 14 TPI (Pack 5)HST, 150mm 18 TPI (Pack 5) Add to Basket Quantity