The bits surface is coated with Titanium Nitride which is extremely hard and highly wear-resistant, therefore enhances the quality and extends the life of the product – The Drill bit tip has a 135° split point geometry which ensures that there is no walking and slipping during operation – Available in various sizes from 2.0mm to 12.5mm and are sold at packs of 5 and 10 pcs Bit Dia (mm) / 6.0 Overall Length (L1) (mm) / 93 Working Length (L2) (mm) / 57 Per Pkg / 10