4-32MM HSS 4241 Step Drill Spiral Groove Ladder Drill Hexagon Shank

Description 4 32MM HSS 4241 Step Drill Bits Titanium Coated Pagoda Drill Ladder Drill Hexagon ShankLadder drill also known as multi purpose drill with straight flute spiral groove single slot White diamonds titanium drill colorful diamond black diamond Handle a round handle triangular handle hex shank SDS shank It has the functions of deburring chamfering and elliptic hole enlargement Don t need to use center punch it is more durable and not easily broken compared with twist drill Specification 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 PlatedWeight 200GType Spiral GrooveHandle Hexagon ShankSize 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32mm 15 stepsScop thin iron plate aluminum insulation panels PVC panels 4mm thickness within the timber Features High speed steel material more durable Titanium coated to reduce friction and run coolerNo need for a pilot hole can automatically deburr holes as you drill Special step stucture can drill different size holes 1 step drill can be used as 1 box of drill bit Working with water cooling can effectively extend the service life of bit drilling speed 250 400 recommended Widely used to cut holes in a variety of material like steel wood thin iron aluminum alloy insulation boards PVC sheet ectPackage included 1x 4 32mm Hexagon Shank Step Drill