Fangrui Product Details Descriptionlength : As Picture Showsis_customized : Yesuse : Wood Drillingmaterial : High Speed Steelmodel Number : Db025mgfk64diy Supplies : Woodworkingtype : Gun Drill Bitbrand Name : Xcanorigin : Mainland Chinacertification : Cexcan Square Drill Bit Square Hole Saw 6.4-25mm Mortise Chisel Wood Drill Bit Hss Hole Cutter With Twist Drill Wood Drilling Toolfeatures:1. This Mortising Chisel Is Great For Drilling Square Holes In Wood With A Mortising Machine Or A Mortising Attachment.2. Square Hole Drill Can Not Be Used On An Electric Drill, Drill Square Holes Need To Fit A Square Hole Drill Drilling (mortise And Tenon Machine) To Use.3. Mortise And Tenon Square Hole Drilled By The Terrible + Outer Sleeve In The Middle Of The Combination.4. Reduce Labor Intensity Of Construction Workers, Speed Up The Construction Speed, Reduce Construction Costs For Construction, Installation, Renovation, Decoration Industries.specification:type: Square Drill Bitmaterial: High Speed Steelhrc: 56noteplease Allow 1-3mm Error Due To Manual Measurement.due To The Difference Between Different Monitors, The Picture May Not Reflect The Actual Color Of The Item.package Including:1pc Square Hole Saw