ITEM NAME:3/8 5/16 inch Spot Welding Drill HSS Welding Point Drill Serrated Hex Shank Descriptio n Specification: Brand new Material: high speed steel Type: straight handle twist drill Dimensions: 7.5cm in overall length, 5/16 (8mm) in diameter, 3/8 (9.5mm), hex shank size 8mm Feature: Cast iron and other difficult to process metal materials. With cost-effective and practical. Provides better panel separations than a panel cutter. High strength and hardness. Durable in use. Use: iron, cast iron, alloy steel, carbon steel, die steel. Package included: 1pcs High-speed steel welding point drill 5/16 (8mm) , 1pcs 3/8 (9.5mm) hex shank Note: Please allow 1-5mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Honesty is gold for all! High-speed steel welding point drill 5/16 (8mm) ,3/8 (9.5mm) hex shank