Features: - [No center punch needed]: The 135° Quick-Cut points are self-centering and penetrate quickly with less pressure. Will not "walk" or "wander". Straight shank allows for firmly holding and accurate centering, fit for standard drill chuck and regular round collet chuck. Must be used and operated at proper RPMs for maximum efficiency. - [Wide application]: Suitablefor Iron, aluminum alloy, copper, plastic, wood, wall, stainless steel, cast iron, etc. Through heat treatment, stainless steel, tool steel, and other workpiece that aredifficult to process, can be processed by these twisted drill bits. - [High quanlity]: Manufactured from M35 high speed steel, with creates a hardened alloy, extremely heat resistant; for much faster cutting and extra longer life span, with up to twelve times when compared with an average HSS drill bit. - [Metal processing]: Particularly successful hard metals, such as stainless steel and systems, they can also be used for softer materials. Specification: Type:Straight shank twist drill; Material:M35 High speed steel; Style:Industrial models; Surface treatment:Titanium plating; Handle:Round handle; Size:1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm; Outer edge angle:135°; Wearable star:7 star; Hardness grade:7A; Number of holes:Approx. 850pcs; Quantity:10pcs; Package:Plastic box; Application:Iron, aluminum alloy, copper, plastic, wood, wall, stainless steel, cast iron, etc; Produce Included: 10 Pcs x Twist drill