This 8-piece M14 red hole drill bit set features vacuum brazed diamond technology for professional drilling applications. Designed for angle grinders with M14 shank compatibility, these bits deliver exceptional performance on hard materials.

• Suitable for both dry and wet drilling applications
• Compatible with porcelain tile, granite, marble, stone, ceramic, and brick
• Constructed with high-strength steel and premium diamond materials
• Vacuum brazing process ensures permanent diamond grain attachment
• Heat-resistant segments for extended tool life
• M14 shank design for secure angle grinder mounting
• Diameter range from 4mm to 150mm for versatile applications

Always wear appropriate protective equipment including gloves, safety helmets, and goggles before operation.

1. Securely attach the hole drill to your angle grinder
2. Test rotation balance by running the tool in air before contact
3. Position drill bit at 20-45 degree angle on material surface
4. Begin drilling slowly until initial hole formation
5. Gradually straighten angle grinder and use circular motion
6. Continue until hole is completely drilled through

Jiangyin Shuangbao Tools Co., Ltd., established in 2014, maintains ISO9001 quality control certification and exports globally to America, Europe, Southeast Asia, and other regions. Our product line includes diamond saw blades, grinding wheels, hole drills, and drill locators suitable for home decoration, construction, DIY, and casting industries.