Package includes 1 x drill bit (3 x 300 mm) 1 x drill bit (3.5 x 300 mm) 1 x drill bit (4 x 300 mm) 1 x drill bit (4.5 x 300 mm) 1 x drill bit (5 x 300 mm) Features - Color: Silver. - Product information: Drill bit set - Size: 30.00X0.30X0.30cm/11.79X0.12X0.12in - Material: Steel. - Heavy-duty, lightweight and durable for easy storage and portable for carbide drill bit environments. - Suitable for drilling, tapping, cutting in metal, aluminum sheet, iron, etc. wide drill bit. - Keep cool and use carefully, the life of the drill bit can be significantly extended by proper use of drill bits. - Excellent drill bit set for metal, wood, plastic countersinking. Suitable for DIY enthusiasts and general construction, engineering use of steel drill bits for carbide. - The drill bit set fits most brands currently on the market, large drill bit. Goods Information twist drill High hardness, rust-proof, solid and durable. Drill bits Drilling and one, one-step processing, significantly saving processing steps and time costs, work efficiency. Wide drill bit Spiral groove, within the processing thread, cutting to exclude, and curved internally threaded through holes were applied. Carbide drill bits The advantage is opening, tapping, chamfering. Large drill bit Self-centering tip, no need for auxiliary center drilling or center punching. Extra long drill bits Save processing steps and time costs, efficiency