Rail drills are divided into high-speed steel series and cemented carbide series, which are used together with rail drills and are necessary drilling tools for railway maintenance. They are characterized by using multiple cutting edges, good wear resistance and high drilling accuracy, and the drilling efficiency is twice as high as that of ordinary twist drills. A drill bit can drill 40-50 holes in the hardest rail at a time, and the drill bit can be polished continuously for more than ten times after being worn; Another kind of cemented carbide rail drill, the drill bit is welded with high-strength cemented carbide blades, which has the advantages of long drilling life, the blade is not easy to wear, and the drill bit is not easy to break. After wear, it can be ground many times, and the price is moderate. It is an ideal imported substitute for many railway maintenance units! Huicang Electromechanical Co., Ltd. is the exclusive agent of CH and EST brands, providing alloy bits, rail bits, hollow bits and high-speed steel bits with long-term preferential treatment.