M35 High Speed Steel Twist Drill Bit, Gold Oxide 6mm Drill Dia. 250mm Length 1/4" X 13.1' making our sander paper not

making our sander paper not easy to break under high grinding intensity

When you open your door

Masonry drill bit set

and 16mm(5/8-inch) outer diameter

Length: 150mm/6 inch

M35 High Speed Steel Twist Drill Bit, Gold Oxide 6mm Drill Dia. 250mm Length 1/4" X 13.1' making our sander paper notDescription 1. Made of M35 HSS(High Speed Steel) cobalt steel. With high hardness and red hardness, wear resistant, and fast drilling performance. 2. The gold oxide surface treatment increases the hardness of the drill bit, provides longer drilling life and better drilling performance, and is more durable and corrosion resistant than uncoated drill bits. 3. Suitable for drilling hard materials and hard metals such as cast iron, hard plastics, but also