The Sandflex® Heavy standard (HST) Bi-Metal blades with precision ground teeth are a series of extra thick blades with a wider body that makes it more rigid & has a higher resistance to fracturing and bending, allowing straighter cuts|Designed for extreme metal cutting|Slope shaped for various types of cuts|Available in two different packaging alternatives:1. An innovative self-service pack, -5P = 5 blades per cassette2. Industrial pack, -10P = 10 blades per box