Specification Brand : Tamco Tools ItemName : Whirly Bits - Shank Size: 7/8" x 3 1/4" (Bit size: 7/8", Drill Depth: 21") ItemTypeKeyword : extra-long-drill-bits Manufacturer : Tamco Tools Material : steel, carbide Material1 : Alloy Steel Material2 : Carbide ProductDescription : Whirly Bit - Shank Size: 7/8" x 3 1/4" (Bit size: 7/8", Drill Depth: 21") The Whirlibit is a carbide inserted chisel tip accessory tool designed specifically for dowel hole drilling. These bits utilize hollow steel so airflow can continuously keep the drill hole clear as well as a carbide tip to handle the hardest material. We offer hole sizes from 5/8" to 1-1/8" in diameter with lengths available in 14", 15", and 21". These Whirly Bits are made in the U.S.A. ProductSiteLaunchDate : 2020-01-22T22:14:30.491Z Style : Bit size: 7/8", Drill Depth: 21" SurfaceRecommendation : Alloy Steel UnspscCode : 20121600