Milwaukee Sawzall reciprocating saw blades designed for medium metal cutting applications. These 4-inch blades feature 18 TPI (teeth per inch) for smooth, precise cuts in materials ranging from 1/8" to 5/16" thickness. Engineered with Tough Neck ribs to strengthen the blade tang and minimize breakage, they offer up to 3X longer life than standard blades. Made in the USA with global materials, this 5-pack of model 48-00-5183 blades ensures you have reliable replacements on hand for demanding demolition or plumbing tasks. The bi-metal construction provides the flexibility and durability needed for professional job site use.