Tap Set, HSS Cobalt Nitrogen Treated Step Drill Bit Set 4-32mm Triangle Shank for Metal(3pcs No Box)

Noted:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.No need for a pilot hole;Titanium coated to reduce friction and run coolerLarge bit has 3 sided shank.Automatically deburr holes as you drillHigh speed steel,durable.Specification :Color : BlackMaterial : High Speed Steel(HSS)Surface : Nitrogen treatment (increasing the hardness and abrasion resistance)Shank:Triangle round handleScop : thin iron plate,aluminum,insulation panels,PVC panels 4mm thickness within the timber.Type:4-32mm(4,6,8,10,12,14,16,18,20,22,24,26,28,30,32mm),Shank:25 x 10mm4-20mm(4,6,8,10,12,14,16,18,20mm),Shank:20 x 8mm4-12mm(4,6,8,10,12mm), Shank:20 x 6mm

• Large bit has 3 sided shank.
• No need for a pilot hole;Titanium coated to reduce friction and run cooler
• High speed steel,durable.
• Automatically deburr holes as you drill