Hex Shank Parabolic Flute Deep Hole Extra Long Drill Bits

Proking high-quality fried dough twist drill is the best drill in China!

The high-quality HSS material with TiN coating extends the life of the drill bit and improves the cutting efficiency.

High cutting speed, high efficiency and long service life

Better design and accurate manufacturing ensure the stability and stability in the processing process.

There are two types of impact mechanism of impact electric drill: dog tooth type and ball type. The ball impact electric drill is composed of moving disc, fixed disc, steel ball, etc. The moving disc is connected with the main shaft through threads and is equipped with 12 steel balls; The fixed disc is fixed on the casing with four steel balls by pins. Under the action of thrust, 12 steel balls roll along the four steel balls, making the cemented carbide bit produce rotary impact motion, and can drill holes on brittle materials such as bricks, blocks, and concrete.