Professional M14 diamond hole drill core bit set designed for precision drilling in hard materials including marble, granite, ceramic, stone, and porcelain tiles. This industrial-grade tool set offers exceptional durability and performance for construction and DIY applications.

• Compatible with both dry and wet drilling applications
• High-strength steel construction with premium diamond segments
• Vacuum brazing technology ensures permanent diamond grain bonding
• M14 shank compatibility with angle grinders (also supports M10 and 5/8-11" adapters)
• Diameter range: 4mm to 150mm for versatile applications
• Extremely heat-resistant segments for extended tool life

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

Securely attach the diamond hole drill to your angle grinder. Test rotation in the air to ensure proper balance and alignment.

Position the drill bit at a 20-45 degree angle on the material surface. Begin drilling slowly until the hole formation initiates.

Gradually straighten the angle grinder to vertical position. Use circular motions to complete the hole drilling process.

Jiangyin Shuangbao Tools Co., Ltd. (SHB TOOLS) has been manufacturing premium diamond tools since 2014. Our products are ISO9001 certified and exported globally to America, Europe, and Southeast Asia. Specializing in diamond saw blades, grinding wheels, hole drills, and drill locators for construction, home decoration, and DIY applications.

Our commitment to "Sharp and durable, safe and efficient" tools ensures labor-saving, portable, and eco-friendly solutions for professional and home users.