Diamond Core Drill Bit Set – 15 Piece Glass, Tile & Marble Hole Saw Kit (8mm-50mm) Carbon Steel Hole Saw Cutter for Glass/Tile/Ceramic/Marble/Porcelain Cutting

Tackle precision drilling with ease using this 15-Piece Diamond Core Drill Bit Set, engineered for clean, accurate holes in ceramic, glass, porcelain, marble, and tile. Each bit is crafted from high-strength carbon steel and coated with industrial-grade diamond grit, delivering smooth cuts and long service life.

Perfect for electricians, plumbers, and kitchen/bathroom installers, this set handles everything from cable entries and tap holes to mounting points and junction box installs.

Features:

✅ 15 x sizes (6 mm – 50 mm) for all job types

✅ Diamond-coated cutting edge for fast, clean holes

✅ Universal shank fits most drills

✅ Ideal for ceramic, glass, marble, and porcelain

✅ Working speed: 800–1000 RPM (wet use recommended)

✅ Long lifespan – up to 20,000 m of cutting performance

How to Use:

1️⃣ Start drilling at a 45° angle and keep the bit wet to prevent overheating.

2️⃣ Once a groove forms, bring the drill upright.

3️⃣ Apply light pressure – let the diamonds do the work.

4️⃣ Slow down near exit points to avoid cracking.

💧 Always use water lubrication to extend bit life and achieve a clean, professional finish.