3pcs HSS Step Drills 1/4 Inch Hex Shank Titanium Coated Step Drill Bit Set

Description 3pcs HSS Step Drills 1 4 Inch Hex Shank Titanium Coated Step Drill Bit SetNew high quality three piece HSS step drillA drill bit can replace the multi branchedUniversal Little HelperSpecification Material High Speed Steel 4241 Used for the hardness of the material which is below 25 like iron borad steel board PVC board Insulation board etc Surface Titanium PlatedType Straight Flute Spiral GrooveHandle Hexagon Shank 1 4 InchScop thin iron plate aluminum insulation panels PVC panels 4mm thickness within the timber SizeDrilling Range inch HoleHeight mm Straight Flute Height mm Spiral Groove Height of Shank MM Shank Diameter inch 3 16 1 23 16 1 4 5 16 3 8 7 16 1 268887241 41 8 1 21 8 5 32 7 32 1 4 9 32 5 16 11 32 3 8 13 32 7 16 15 32 1 21275751 4 3 41 4 5 16 3 8 7 16 1 2 9 16 5 8 11 16 3 497372Suitable for Products for automotive processing aerospace sheet metal processing installation and maintenance of electrical and other industries high altitude operations with hand drills and other tools Feature 1 The unique step structure a variety of standard size drill carve aperture a box arrived on a ladder drill bit 2 Without the use of center punch easy to break a step drill specifications apply 3 Deburring chamfering expanding the oval hole4 Small sway without leading to use a center punch can carve out a nice aperture Package included 1x 3 16 1 2 Step Drill1x 1 8 1 2 Step Drill1x 1 4 3 4 Step Drill