【99pcs Drill Bit Set Size】: This Set Contains 16Pcs 1.5mm，16Pcs 2mm15Pcs 2.5mm，10Pcs 3mm，10Pcs 3.2mm，8Pcs 3.5mm，8Pcs 4mm，3Pcs 4.5mm，3Pcs 5mm，2Pcs 5.5mm，2Pcs 6.0mm，2Pcs 6.5mm，2Pcs 8mm，2Pcs 10mm  various sizes to drill different sizes of holes in various materials.

【Material】: The core material of this drill bit is High-Speed Steel (HSS). HSS is known for its excellent hardness, wear resistance, and ability to withstand high temperatures during drilling.

【Titanium Coated】: The drill bit features a titanium coating on its surface. This coating enhances the performance and durability of the bit in several ways:increased Hardness; Improved Lubricity;Enhanced Wear Resistance.

【118 Deg. Point】: The 118 deg.point angle ensures easy and quick self-centering without "walking" and guarantee clean and accurate hole sizes drilling.

【Multiple Application】: These drill bits are suitable for tasks such as drilling holes in metal sheets, woodworking, and other general-purpose drilling applications. The combination of HSS and titanium coating ensures reliable and consistent performance.