These top ten drill bits are good:

Far East TDC is the only company in China’s hardware industry that has achieved overseas mergers and acquisitions, one of the largest twist drill bit manufacturers and an industry leader, Dalian Far East Tools Co., Ltd. company.

Tiangong TG has been awarded as China Famous Brand, High-tech Enterprise, one of the leading high-speed steel/cutting tool production bases, a large twist drill manufacturer, Jiangsu Tiangong Tools Co., Ltd.

Black & Decker was founded in the United States in 1910. It is a world-famous tool brand, one of the world's largest power tool manufacturers, a large multinational company, and the American Stanley Black & Decker Company.

FEIDA is one of the world's largest high-speed tool steel manufacturers. It has been awarded the title of Chinese Famous Brand, National High-tech Enterprise, International Enterprise Group, and Jiangsu Feida Drill Bit Co., Ltd.

Harbin No. 1 Tool Manufacturing Co., Ltd. is one of the largest precision tool/CNC tool production bases in China, a large-scale key enterprise in China's key equipment industry, and Harbin No. 1 Tool Manufacturing Co., Ltd.

Shanggong was founded in 1949. It has been awarded China Famous Brand, one of the most influential brands in the domestic cutting tool industry, Shanghai Famous Brand Product, and Shanghai Tool Factory Co., Ltd.

BOSCH Bosch was founded in Germany in 1886. It is a world brand, a leading manufacturer of global power tools, an influential brand in the industry, and Bosch Power Tools (China) Co., Ltd.

Lianlian LINKS has been awarded as China Famous Brand, one of China's largest precision tool measuring tool manufacturing companies, a leader in China's tool industry, and Harbin Measuring Tools and Cutting Tools Group Co., Ltd.

Fangdawang is a leading enterprise in the national drill bit (construction) industry base, one of the top ten hemp diamond brands, a well-known brand in the domestic hardware tool industry, and China·Fangda Holdings Co., Ltd.

Chuanpai was founded in 1956. It has been awarded as China Famous Brand, National Key Measuring Tool Manufacturing Enterprise, National High-tech Enterprise, and Chengdu Chengliang Tools Group Co., Ltd.

In addition to twist drills, other drill bit categories:

The cutting part of the flat drill is spade-shaped, with simple structure and low manufacturing cost. The cutting fluid can be easily introduced into the hole, but the cutting and Chip evacuation performance is poor. There are two types of flat drill structures: integral type and assembled type. The integral type is mainly used for drilling micro holes with a diameter of 0.03 to 0.5 mm. The assembled flat drill blades are replaceable and can be internally cooled. They are mainly used for drilling large holes with a diameter of 25 to 500 mm.

Deep hole drilling usually refers to tools that process holes where the ratio of hole depth to hole diameter is greater than 6. Commonly used ones include gun drill, BTA deep hole drill, jet drill, DF deep hole drill, etc. Nesting drills are also commonly used for deep hole processing.

The reamer drill has 3 to 4 teeth and is more rigid than a twist drill. It is used to expand existing holes and improve processing accuracy and smoothness.

Countersink drills have more teeth and use forming methods to process the hole end into the required shape. They are used to process countersunk holes for various countersunk head screws or to flatten the outer end face of the hole.

The center drill is used for drilling the center hole of shaft workpieces. It is essentially a combination of a twist drill and a countersink drill with a very small helix angle, so it is also called a composite center drill. There is a hollow drill bit in the middle of the core drill pipe, which is mainly used for core drilling.