Irwin 49916 1-Inch by 7-1/2-Inch Solid Center Auger Bit Product Description #I-100, 1" Solid Center Auger Bit, 4-1/2" Twist Length, 7-1/2" Overall Length, Provides Extra Rigidity While Boring, Wide Lands Keep The Bit Straight As It Bores Through The Hole, The Flutes Are Ground Behind The Lands To Funnel The Chips To The Inside Of The Bit Away From The Outside Diameter, Producing A Faster Cleaner Cut, Single Spur Cutting Edge Scribes The Circumference Of The Hole For A Smoother Finis, Course Screw Point Provides Fast Boring In Hard Soft Woods, Full Length Heat Treated Bit Guards Against Bending In Heavy Duty Applications Strengthens The Twist Where The Greatest Strain Occurs, Pouched. From the Manufacturer Dual Auger Wood Boring Bit, 4-1/2-inch twist with a 1-inch diameter cutter, for use in 3/8-inch or larger electric drills and hand braces, is heat-treated along its full length for added strength. A coarse screw point provides for fast boring in all types of wood, and the 7-1/2 inches overall length can bore through up to three studs. Irwin tools are made of only the finest materials, manufactured to exacting tolerances. Features This product is easy to use. This product is highly durable This product is manufactured in China 7-1/2" overall length with a 4-1/2" twist, 1" diameter cutter and 5/16¿ hex shank, comes in a plastic pouch Heat-treated full length for added strength Coarse screw point for fast boring in all types of wood 7-1/2" overall length can bore through up to three studs USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.