99pcs HSS Steel Titanium Coating Twist Drill Bits Set

Professional assortment of metric sizes and industrial quality. Service life is six times longer with Titanium Nitride (TiN) coating. Made of heat treated HSS 4241 high speed steel. Type N bits cylindrical with tapered conical surface 118 degrees, TiN gold surface. The bits are placed inside the metal case, sorted and classified by size. Specifications: Model: NB030207. HSS drill bits. Manufactured from hardened high speed 4241 steel. Titanium nitride (TiN) coating. Metric sizes from 1.5 to 1.0mm. For drilling: steel, plastic and wood. Flute type: spiral. 118 degrees split point. Shank type: straight shank. Tensile strength up to 900 N/mm². Steel slotted storage case. Weight: 2.8lbs or 1.3kg. Sizes: 16 pieces x 1.5mm, 16 pieces x 2mm, 15 pieces x 2.5mm, 10 pieces x 3mm, 10 pieces x 3.2mm, 8 pieces x 3.5mm, 8 pieces x 4mm, 3 pieces x 4.5mm, 3 pieces x 5mm, 2 pieces x 5.5mm, 2 pieces x 6mm, 2 pieces x 6.5mm, 2 pieces x 8mm, 2 pieces x 10mm. Please note: Recommended using oil when drilling thru steel; oil helps to control the heat of the drill bit and prolongs service life and sharpness of the drill bit. Package includes: 99 Pieces HSS Titanium Nitride coated drill bits, Black steel, slotted storage case.