Remove debris and debris away from the drill bit, reduce friction and heat, and make the drilling process faster and cooler.100% and high qualityMaterial: HSS - Co (M35)Color: as shown in picFeatures:Made of cobalt material, rigid and durable.Triangle shank which is more solid and convenient.With a case, easy for storage and carrying.Great tools for drilling holeApplication: suitable for thin metal, aluminum, iron, angle steel, carbon steel, 304 stainless steel. Specifications:Type: M35 Twist DrillSize:48 x 2mm/1.89" x 0.08"(L x Dia)Quantity:10 Pcs/SetNote: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!