KATSU 99PCs Twist Drill Bits Set HSS 4341/M2 Grade High-Speed Steel 1.5mm-10mm Multi Drill Bits for Drilling Stainless Steel, Iron, Aluminium, Copper, Wood, Plastic, with Storage Case

• Made from high quality 4341 HSS Steel (M2)
• Cuts faster and lasts much longer than most of normal HSS drill bits
• Suitable for Stainless steel, mild steel, wood, plastic, and similar material
• 99pc Set in 14 sizes ranging from 0.5mm to 10mm for most drilling application
• Packed in well organized carrying case

Made from high quality HSS grade 4341 or M2. It will cut faster and last longer than standard HSS drill bits It is superior to the older high-carbon steel tools, it can withstand higher temperatures without losing its temper (hardness). This property allows HSS to cut faster than high carbon steel, M2 HSS grades generally display high hardness (above Rockwell hardness 60) and abrasion resistance (generally linked to tungsten and vanadium content often used in HSS) compared with common carbon and tool steels. Suitable for stainless steel in addition to mild steel and other similar material. Supplied in a steel organized case. Perfect for home DIY and general building / engineering use. Set contains: 16 x 1.5mm, 16 x 2mm, 15 x 2.5mm, 10 x 3mm 10 x 3.2mm, 8 x 3.5mm, 8 x 4mm, 3 x 4.5mm, 3 x 5mm, 2 x 5.5mm, 2 x 6mm, 2 x 6.5mm, 2 x 8mm, 2 x 10mm