8" Long x 0.05 Thickness x 18TPI x 3/4" Width Reciprocating Saw Blade. Professional grade. 8% Cobalt matrix. HSS cutting edge laser welded to a high alloy steel back. This creates a blade that is long lasting, super tough, yet flexible to handle the toughest jobs Increased hardness (HRc 67) allows cutting of harder material such as Stainless Steel Lasts longer than normal high speed steel bi-metal blades Shatter-resistant to achieve a higher standard of user safety Special CAD/CAM computer tooth design to cut faster and last longer.