6pcs/set Cobalt Drill Bit Set High-Speed Steel 3-8mm Composite Tap Drill Bit Set Metric Screw Bit Tap Drill Metal Specia

6 most commonly-used sizes to satisfy all your needs. This drill bits set fits the majority of power drill currently on the market and come with a portable plastic bag for easy storage and organization.Industry grade 6542 high-speed steel drill bit set, harder than 4241 HSS used in other similar drill bits set. These drill bits also contain 5% Cobalt, which increases wear-resistance and durability.Fully ground spiral groove design quickly decreases friction and heat for a faster and cooler drilling performance. 135-degree split point with straight shank prevents walking and makes drilling precise and faster. No center punch is needed.Suitable for Cutting Hard Metal such as Stainless Steel, Steel and Cast Iron as well as Wood, Aluminum Alloy, and Other Softer Metals, including tiles, concrete, tiles, bricks, wood, plastic, glass, masonry and more. The product has edges and high drilling efficiency. The center of the product has serrations, and with its help, the drill can continue to drill horizontally after drilling.Package ContentsOption 1 : 1 x 3mm Serrated drillOption 2 : 1 x 4mm Serrated drillOption 3 : 1 x 5mm Serrated drillOption 4 : 1 x 6mm Serrated drillOption 5 : 1 x 6.5mm Serrated drillOption 6 : 1 x 8mm Serrated drill

• 6 most commonly-used sizes to satisfy all your needs. This drill bits set fits the majority of power drill currently on the market and come with a portable plastic bag for easy storage and organization.
• Industry grade 6542 high-speed steel drill bit set, harder than 4241 HSS used in other similar drill bits set. These drill bits also contain 5% Cobalt, which increases wear-resistance and durability.
• Fully ground spiral groove design quickly decreases friction and heat for a faster and cooler drilling performance. 135-degree split point with straight shank prevents walking and makes drilling precise and faster. No center punch is needed.
• Suitable for Cutting Hard Metal such as Stainless Steel, Steel and Cast Iron as well as Wood, Aluminum Alloy, and Other Softer Metals, including tiles, concrete, tiles, bricks, wood, plastic, glass, masonry and more.
• The product has edges and high drilling efficiency. The center of the product has serrations, and with its help, the drill can continue to drill horizontally after drilling.