The Heavy Metal blade family is designed for demanding metal cutting of thick materials. Virtually unbreakable Sandflex® bi-metal blade for all materials and type of cut. Version 1: 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. Version 2: Standard (ST) bi-metal blades with coarse precision ground teeth are a series of flexible blades with standard body that makes it more flexible and easy to bend into position. Slope shaped nose for various types of cuts. Packaging alternative 1: Retail packed either in -2P = 2 blades or -5P = 5 blades per pack. Packaging alternative 2: Industrial pack, -10P = 10 blades per box