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.Pack of 5 Bahco 3940-150-14-HST Heavy Metal Reciprocating Blade 150mm 14 TPIAdditional Information:• Application: Metal• Length (mm): 150• Tooth Pitch (TPI): 14• Pack Qty.: 5