RELAX 13pcs Titanium Coated HSS Twist Drill Bit Set with 1/4 Inch Hex Shank Serrated Grooving Spiral Drill Bit set for Aluminum Copper Metal Plastic

Strong & Durable: These twist drill bits are made of premium high speed steel with titanium coated high wear and heat resistant anti-rust treatment and a reinforced head prevents bit cracking and provides a longer life. Precise & Efficient: Twist drill bits with sharp grinding carbide tips can provide faster start and less walking in plastic and metal. Wide slot design provides fast dust removal capability and reduces heat. Spiral Groove Design: Fully ground spiral flutes are designed to quickly reduce friction and heat for faster cooler drilling performance. For drilling and cutting new threads while you get a smooth tapping experience. Multiple Size: SAE twist drill bits have 6 different sizes:6-32NC 8-32NC 10-24NC 10-32NC 12-24NC 1/4-20NC Metric twist drill bits have 6 different sizes: M3 x 0.5 M4 x 0.7 M5 x 0.8 M6 x 1.0 M8 x 1.25 M10 x 1.5. Wide Application: These twist drill bits are suitable for pulling groove boring or cutting copper brass aluminum sheet metal low carbon steel plastic etc. Greatly save processing steps and time cost to improve work efficiency. Specification: Product name: Twist Drill Bit Material: high speed steel titanium coated Color: as show Shank: 1/4 hex shank SAE size: 6-32NC 8-32NC 10-24NC 10-32NC 12-24NC 1/4-20NC Metric size: M3 x 0.5 M4 x 0.7 M5 x 0.8 M6 x 1.0 M8 x 1.25 M10 x 1.5 Feature: spiral groove fast drilling multiple size Application: copper brass aluminum sheet metal low carbon steel plastic etc. Quantity: 13pcs Parts List: 6* SAE Twist Drill Bits 6* Metric Twist Drill Bits 1* Hex Shank Adapter 1* Storage Case Note: 1. Please allow 1-3cm measuring deviation due to manual measurement. 2. Due to the different monitor and light effect the actual color of the item might be slightly different from the color showed on the pictures. Thank you!