Sharp Wear-Resistant: These drill bits are made of 4241 high speed steel with titanium coating for proven capability and durability. Multi-Purpose: Great tools for drilling holes in soft metal, wood, plastic, fiberglass, etc. Twist Design: Precise 135o Split Point drill bit ensures clean accurate hole drilling. 99 Pcs Drill Bit Set: Including 16 pcs 1.5mm bits, 16 pcs 2.0mm bits, 15 pcs 2.5mm bits, 10 pcs 3.0mm bits, 10 pcs 3.2mm bits, 8 pcs 3.5mm bits, 8 pcs 4.0mm bits, 3 pcs 4.5mm bits, 3 pcs 5.0mm bits, 2 pcs 5.5mm bits, 2 pcs 6.0mm bits, 2 pcs 6.5mm bits, 2 pcs 8.0mm bits, 2 pcs 10.0mm bits. Along with a Plastic Case to keep drill bits organized while not in use. Material: High Speed Steel Body, Titanium Coating Number of Pcs Size: 16 x 1.5mm Twist Drill Bit 16 x 2.0mm Twist Drill Bit 15 x 2.5mm Twist Drill Bit 10 x 3.0mm Twist Drill Bit 10 x 3.2mm Twist Drill Bit 8 x 3.5mm Twist Drill Bit 8 x 4.0mm Twist Drill Bit 3 x 4.5mm Twist Drill Bit 3 x 5.0mm Twist Drill Bit 2 x 5.5mm Twist Drill Bit 2 x 6.0mm Twist Drill Bit 2 x 6.5mm Twist Drill Bit 2 x 8.0mm Twist Drill Bit 2 x 10.0mm Twist Drill Bit Measurement System: Metric Weight: 720g/1.58lbs (including the case) Package Includes: 1 Set of 99pcs Drill Bits with Case Material: High Speed Steel Body, Titanium Coating Number of Pcs Size: 16 x 1.5mm Twist Drill Bit 16 x 2.0mm Twist Drill Bit 15 x 2.5mm Twist Drill Bit 10 x 3.0mm Twist Drill Bit 10 x 3.2mm Twist Drill Bit 8 x 3.5mm Twist Drill Bit 8 x 4.0mm Twist Drill Bit 3 x 4.5mm Twist Drill Bit 3 x 5.0mm Twist Drill Bit 2 x 5.5mm Twist Drill Bit 2 x 6.0mm Twist Drill Bit 2 x 6.5mm Twist Drill Bit 2 x 8.0mm Twist Drill Bit 2 x 10.0mm Twist Drill Bit Measurement System: Metric Weight: 720g/1.58lbs (including the case) Package Includes: 1 Set of 99pcs Drill Bits with Case