MILWAUKEE TOOL 48-89-2801 钻头套件, THUNDERBOLT系列, 黑色氧化物, 21件
® Thunderbolt® Black Oxide Jobber length drill bits are designed for extreme durability and long life. The Thunderbolt® web features a thicker core than a standard drill bit, which provides ultimate strength and protects against side-load breakage. A specially designed parabollic flute form clears chips and debris fast to keep the bit cool. A precision start, 135 Split Point tip starts on contact to keep the bit from walking for fast accurate holes. Excellent for drilling on curved surfaces, requires less effort to drill and is highly recommended for use with portable drills. The 3-Flat Secure-Grip shank won"t slip in the drill chuck. Reduced shank diameter for use in 3/8" chucks. 21pc Thunderbolt® Black Oxide Drill Bit Set comes with Two 1⁄16", Two 5⁄64", 3⁄32", 7⁄64", Two 1⁄8", 9⁄64", 5⁄32", 11⁄64", Two 3⁄16", 13⁄64", 7⁄32", 15⁄64", Two 1⁄4", 5⁄16", 3⁄8", 1⁄2"
**Features**
* Thunderbolt® Web, Provides Longer Life and Faster Driller Times
* Parabollic Flute, Clears Chips Faster
* 135° degree Split Point, Precision Start No Walking
* 3-Flat Secure Grip Shank, Reduces Bit Slipping in Chuck