Professional 5-piece diamond hole drill set featuring hexagonal handle design and vacuum brazing technology for superior performance in stone and tile applications.

• Dry and wet drilling capability for porcelain tile, granite, marble, stone, ceramic, and brick
• Constructed with high-strength steel and premium diamond materials
• Vacuum brazing process ensures permanent bonding of industrial diamond grains to steel core
• Unbreakable and extremely heat-resistant segments for extended tool life
• Compatible with angle grinders featuring M10, M14, or 5/8-11" shanks
• Comprehensive diameter range from 4mm to 150mm

Step 1: Review usage guidelines and wear appropriate safety equipment including gloves, safety helmet, and goggles.

Step 2: Securely attach the hole drill to your angle grinder. Test rotation in air to verify balance and stability.

Step 3: Position drill bit at 20-45 degree angle on material surface and begin drilling until initial hole formation.

Step 4: Gradually straighten angle grinder to vertical position while maintaining circular motion until hole is completely drilled.