Top 10 Best 7/8 Drill Bit

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction right-hand cut spiral fluted tools evacuate chips up and out of the cut to reduce clogging. Ideal for drilling in low and medium tensile strength materials.

Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools performance is similar to uncoated tools. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction right-hand cut spiral fluted tools evacuate chips up and out of the cut to reduce clogging. Manufactured to National Aerospace standard 907.

This product is easy to use.. This product is highly durable. This product is manufactured in China.

Razor sharp serrated edge for fast and flawless cutting. Quality Forged Construction for extended life. Ultra Sharp Spur to ensure an accurate starting hole. Steep Angled Cutting Edges produce holes that are smooth and flat, and create chisel-like curls for fast, clean chip removal..

Each WeldTec auger bit features a hard cutting edge welded to the base material. Auger drill bit features a long-lasting nail-cutting life. Wide flutes and a 716-inch quick-change impact shank make this a versatile auger drill bit. 78 diameter. 17 overall length.

Fast material penetration with self-feed spur. Durability in nail embedded wood. Long bit life with hardened alloy steel. Quick bit changes with a 716 ball groove shank.

M2 HSS Cuts A LOT MORE CLEAN holes and much EASIER than average step bits. In general, M2 has 50 more Tungsten and 150 more Molybdenum, both of which are key elements in improving durability. Our additional Vacuum heat treatment and Nitride surface hardening treatment make the performance even better.. Non-stop Our Polished Steps and Size Highlights let you able to see target hole size during drilling. No need to stop in the middle of the drilling and check. Save you time and hassle.. Easy Fast With our high-accuracy CNC processing and several optimized design details over the years, our design cuts EASY, FAST and CLEAN, outperforming the average ones on the market.. Heavy duty Cuts holes on Stainless steel, Hardened Metal, Mild steel, Galvanized steel, Aluminum, Copper, Plastic, Wood, or anything that has similar or lower hardness as these materials. Up to 12ga 2.7mm thickness for Stainless steel.. Multi Hole Sizes No need to buy a kit. This one step bit comes with 12 sizes so you can drill 12 different hole sizes, saving you time and effort to change bits. Marked sizes include 316, 14, 516, 38, 716, 12, 916, 58, 1116, 34, 1316, 78..

IRWIN SPEEDBOR drill bits use a tri-flute design for faster chip ejection and less binding. This 78-inch drill bit has cutting spurs with 3 cutting edges for faster, cleaner holes. A full screw tip allows the drill bit to self-feed for ease of drilling. The grooved hex shank helps prevent slipping in the drill chuck or bit extension. Fits virtually any standard 14-inch quick-change chucks, including impact drills. IRWIN SPEEDBOR drill bits use a tri-flute design for faster chip ejection and less binding. This 78-inch drill bit has cutting spurs with 3 cutting edges for faster, cleaner holes. A full screw tip allows the drill bit to self-feed for ease of drilling. The grooved hex shank helps prevent slipping in the drill chuck or bit extension. Fits virtually any standard 14-inch quick-change chucks, including impact drills.

High Speed Straight Steel Shank Drill Bit. Works with both wood metal. 3-Flat Shank 716. Hole 78. Length 12.

316 to 78 Step Drill Bit Includes 12 step sizes with 316, 14, 516, 38, 716, 12, 916, 58, 1116, 34, 1316, 78. Industrial Grade Materials Manufactured with heat treated High-Speed-Steel HSS bits with Titanium Coated. Smoother Cutting Two-Flute Design for smoother cutting and faster removal of chips, making the debris easy to fall off. Tri-Flatted Shank Tri-flatted side cutouts fits into power tools chuck securely to eliminate slippage and provide stronger grip for standard drill chuck. Longer Strength Durability Perfect for drill holes in steel, copper, plastic, aluminum, and other thin materials Thickness is below 5 mm. No need to replace other step drills and save time.