XLCMSY Straight Resistant Stainless 1.5-6.5mm: Durable and Versatile Metal Rods for All Your Projects Review

【Heat Resistant】 This metric straight shank twist drill set is made of 5% cobalt high speed steel, adding molybdenum and cobalt to form a hardened alloy with a Rockwell hardness of 67, It is super heat resistant and wear resistance can cut hard metals quickly, suitable for drilling high hardness materials, up to 10 times life than ordinary HSS drill bits. 【Safe & Eco-friendly】 High speed steel with 5% cobalt, durable, safe and eco-friendly, providing longer tool life and reducing environmental pollution, It is a very practical and user-friendly drill bit for cutting through hardened material, golden surface treatment holds up lubricant better for smoother drilling. 【Lightweight & Durable】 Designed with a 135 degree split point, these metric drill bits are very lightweight, eliminating the need for a center punch, making cutting faster and less powerful, preventing walking and cutting stainless steel more precisely, thanks to its precision grinding inclined blade design, each bit ensures fast drilling with excellent chip removal. 【Multiple Sizes & Widely Used】The metal drill bits set for steel are available 13 sizes to meet your different needs, drill bit sizes include : 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm, these cobalt drill bits are widely used in metalworking, it is ideal for cutting hard alloys such as stainless steel and cast iron, not suitable for glass or ceramic. 【Practical Design】The metal drill bits kit features a straight shank design that makes it easier to fix and precisely machine, saving time and improving work efficiency. It is perfect match for home DIY, workshop or vehicles repair shop.