Set of 5 high-speed steel drill bits from 16 mm to 30 mm for metal, copper, stainless steel and iron plate

Includes 16 mm, 18.5 mm, 20 mm, 25 mm, 30 mm, 25 mm, and 30 mm, a total of 5 wood openers with different specifications, to meet the needs of various applications. The reamer has been improved with high-precision turning using M35 high-speed steel containing cobalt for grinding the tooth edge. It can be used with hand drills, bench drills, and magnetic drill attachments. Features: The high-precision grinding edge reduces resistance to tooth opening, and the speed is fast.