3-13mm HSS Titanium Coated Step Drill 1/4 Inch Hex Shank Step Drill Bit

Description 3 13mm HSS Titanium Coated Step Drill 1 4 Inch Hex Shank Step Drill Bit Specification Material HSSSurface treatment titaniumShank 1 4 HexagonalSize 3 13mm 11 steps 3 4 5 6 7 8 9 10 11 12 13mm Tools pistol drill bench drill Shank 7mm dia 30mm L Total 77mm L Qunantity 1pcAllow 1 3mm measurement error Features 1 The ladder of its unique structure a bit can open a variety of specifications of aperture 2 Do not need to use center punch compared with twist drill is not easy to be broken 3 Deburring chamfering elliptic hole enlargement twist drill the function of them was unable but it is possible 4 The use of tools drill bench drill Work while water cooling can effectively extend the service life of drill bit 5 High speed steel used in hardness under 25 ° workpiece the plate thickness under 5 mm such as carbon steel plate sheet iron insulation boards wood Cannot be used for stainless steel Package Included 1x 3 13mm Step drill More Details