DescriptionThis is a set of 99pcs HSS Drill Bits. This item is well made of durable hardened steel and tempered twice for extra hardness,promising you a long lasting screw extractor tool of rugged material and outstanding performance. This item is well made of premium material for durable and practical use. With precise design and high quality, it is perfect for drilling through numerous materials and for carpenters, repairmen, contractors, handymen,or do-it-yourselfers.Feature- Color: As shown. - Material: Alloy. - Size: Approx. 23.5x21.5x4 cm. - Various applications: 1.5mmx16pcs2mmx16pcs2.5mmx15pcs3mmx10pcs3.2mmx10pcs3.5mmx8pcs4mmx8pcs4.5mmx3pcs5mmx3pcs5.5mmx2pcs6mmx2pcs6.5mmx2pcs8mmx2pcs10mmx2pcs. - Easy to use and operate. Easily switch between bits in seconds. - Well made of premium material for durable and practical use. - Reinforced head that prevents bit cracking and provides a longer life. - Well protected against rust. - Sharpened edges for easy penetration in glass, mirrors, ceramics and other hard brittle materials like stucco. - Applicable to ordinary hand electric drill or bench drill.