4-39mm HSS Round Shank Titanium Coated Step Drill/Pagoda Drill/Ladder Drill

Description 4 39mm HSS Round Shank Titanium Coated Step Drill Pagoda Drill Ladder DrillSpecification Material High speed steel 4241Size 4 39 mm 4 6 9 12 15 18 21 24 27 30 33 36 39 mmShank 10mm dia 22mm L Total 107 5mm L Allow 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 the ordinary twist drill is not easy to be broken 3 Deburring chamfering elliptic hole enlargement twist drill the function of themwas 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 Package Included 1xTitanium Step DrillMore Details