For Metal Demolition (1/8" to 1/2") The Diablo DS0608BFD5 5-Pack STEEL DEMON® Demolition Bi-Metal Reciprocating Blade 6" x 10-18 TPI delivers 4x the performance of standard blades. These are the first Dual Tooth Design Bi-Metal blades with Perma-SHIELD® Non-Stick coating and an Ultra-Hardened cutting edge with hardness to HRC62 for maximum durability and speed.Perma-shield coating protects the blade from heat, gumming, and corrosion Thick demolition blade body for extreme durability Ultra hardened edge increases the hardness of the cutting edge to a Rockwell Hardness of HRC 62 versus HRC 55 for standard bladesApplication: Metal Demolition (1/8" to 1/2") Length: 9" Teeth Per Inch (TPI): 8-10 Teeth: Bi-Metal Ultra Edge Tooth Design: Dual ToothPlease Note: Diablo Tools products can only be sold and shipped to locations in the United States and territories. Additionally, these product cannot be sold to any person or company who will be reselling them to end users.