![]() ![]() We think this is a great addition because it means your bits will fit an impact driver as well as your drill. Some drills are made with a ¼” hex head fitting as opposed to the traditional cylindrical drill shank. Given most sets are not hugely expensive, many just opt to buy a replacement. After this point, it’s probably not worth sharpening them. When the coating wears away with usage, the drills will become more susceptible to rust. It is worth noting that coated drills do eventually wear out. Cobalt alloy drills generally aren’t coated, so you won’t need to worry about coating options for those. Titanium nitride coated drills are therefore better suited to light metal drilling, and can offer and cheaper and more versatile alternative to a set of cobalt alloy drills. This both prevents rust and helps to reduce drilling friction and therefore heat. The most basic option is a black or gold oxide, which helps to prevent rusting.Ī slightly better option is titanium nitride coating. As a result, most drill sets that are sold these days, and indeed all in this review, will have some sort of coating. High-speed steel is a good material for most drill bits but it suffers from one major weakness: rust. In addition, you can sharpen these uncoated bits to extend their life. Although more expensive, these drill sets have better heat dissipation and work well when drilling through iron and steel. If you are doing heavy metal drilling, however, you might look to a cobalt alloy drill bit set. That said, you’ll find the vast majority of drill bits made from it and particularly with the coating applied, it remains a good choice. Although this material is very hard, making it ideal for drill bits, it is also prone to rust and can be very brittle. Most drill bits are manufactured from high-speed steel and typically coated to help prevent rust. We’ll go over many of the different features you’ll see to help you understand which drill bit set is the best choice for your personal application. Drill Bit Buyer’s Guideĭrill bits come in many different shapes and sizes to suit different applications and price points. If you’re looking for a great set of everyday drill bits without all the bells and whistles found at higher prices, this set from Comoware will be a great selection. They come fitted with the ¼” hex head, making them suitable for regular cordless drills and impact drivers as well. ![]() With a standard 135-degree split point and a titanium nitride coating, these drills will work well for wood, plastic and light metal applications. Aimed at commercial and residential users, these bits offer fantastic value for money and incorporate many elements you would not expect to find at this price point. Hugely popular with reviewers, this fully featured set of drills from Comoware is a real diamond in the rough. ![]()
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