GRAPHITE Diamond Hole Saw Set (18, 22, 27, 35 mm), 4 Pieces, M14 Thread

When a tiler needs to cut clean holes in porcelain tiles for pipe penetrations, or an electrician has to pass cables through a granite countertop, this GRAPHITE diamond hole saw set delivers the precision and speed required on the job site. The set includes four diamond-coated hole saws with diameters of 18 mm, 22 mm, 27 mm, and 35 mm, covering the most common sizes for plumbing and electrical installations. Each hole saw features an M14 mounting thread, allowing direct attachment to angle grinders with a matching spindle—no additional adapter needed.

Key specifications

• Diameters included: 18 mm, 22 mm, 27 mm, 35 mm
• Mounting thread: M14
• Cutting edge material: industrial diamond
• Body material: high-grade steel
• Maximum drilling depth: approximately 35 mm
• Recommended drilling method: wet drilling
• Compatible materials: ceramic tiles, porcelain, stoneware, glass, marble, granite, terracotta
• Compatible tools: angle grinder with M14 spindle
• Packaging: durable plastic storage case

Why choose it

The diamond-coated cutting edges ensure high cutting speed and clean, precise, chip-free holes even in hard, abrasive materials. Wet drilling is recommended to cool the cutting edge, which significantly extends tool life and improves cut quality. The high-grade steel body provides stability and reduces vibration during operation. The set comes in a sturdy plastic case that keeps the hole saws organized and protected when not in use.

Ideal use cases

• Drilling holes for water supply and drainage pipes in tiled walls and floors
• Creating openings for electrical outlets and switches in stone or ceramic surfaces
• Installing fixtures and fittings in bathrooms and kitchens
• Making decorative holes in glass or marble for lighting and hardware

Good to know

For optimal performance and longevity, always use water cooling during drilling. Apply moderate, consistent pressure and avoid excessive speed to prevent overheating. The M14 thread fits most standard angle grinders, making this set a versatile addition to any professional or DIY toolkit. The included case allows for easy transport and storage on the job.