MILWAUKEE® revolutionized the power tool industry in 1951 when they released the SAWZALL®, the first portable electric saw with a reciprocating mechanism. The SAWZALL® and more recent HACKZALL® are both still defining MILWAUKEE® tools to this day. Both of these tools are supported by a full line of SAWZALL® blades for cutting all types of materials. Product Description ROUGH-IN™ SAWZALL® Blades have been engineered to solve the unique frustrations encountered when cutting through-holes during rough-in work. It cuts easily controlled small diameter holes in nail embedded wood like no other blade on the market. All MILWAUKEE® SAWZALL® Blades are proudly Made in the USA. Features NAIL GUARD™ - Unique design protects against tooth fracture when cutting nails between studs and joists, FANG TIP™ - Delivers fast plunge cutting for window cut-outs, Unique Blade Geometry - Protects against floor impacts during bottom plate cut-outs, Floor Guard - Shields teeth from floor contact during bottom plate cut-outs, Double Truss Design - Guides blade for straight window cut-outs, Specifications Blade Length: 185 mm (7"), Blade Height: 15 mm, Blade Thickness: 1.57 mm, Teeth per Inch: 5TPI, Tooth Strip: Bi-Metal, Includes 5 x Blades,