BGTEC Diamond Core Drill Bit Kit - Triangle Shank Hole Saw Set

In this review the BGTEC Diamond Core Drill Bit Kit is presented as a practical, all-in-one set for tradespeople and DIYers who cut holes in tile, stone, and masonry. The bottom line: the kit earns its keep when you need a wide range of clean holes and reliable bits for wet or dry use. The triangular shank and upgraded vacuum brazing process are the single biggest reasons to consider this kit, because they improve clamping stability and extend life compared with ordinary plated bits.

Key Features

• Complete size range: The 12-piece set includes cores from 6mm up to 65mm, covering common sink, pipe and fixture hole sizes so you can finish varied tile jobs without searching for individual saws.
• Triangular shank: The triangle shank delivers more stable clamping in hand drills and bench drills which reduces wobble and helps keep holes round and accurate.
• Upgraded diamond bond: High quality diamond particles and vacuum brazing increase cutting speed and make the bits last roughly three to five times longer than ordinary plated cores.
• Diamond chamfer finger bit: The included 50mm chamfer bit lets you enlarge, shape, polish or bevel rough holes so edges finish cleanly after drilling.
• Wide material compatibility: Designed for wet or dry drilling into porcelain, ceramic tile, marble, granite and masonry so the same set can be used across most tile and stone projects.
• Machine flexibility: The cores and 6mm carbide pilot bit work with hand drills, bench drills and most machines when hammer mode is disabled and recommended RPMs are observed.

Who It's For

This kit is well suited to tile installers, plumbers, and experienced DIYers who need a variety of hole sizes for sinks, faucets, vents and conduit in porcelain, ceramic, and natural stone. The durable diamond bond and chamfer bit make it a sensible choice for jobs where clean edges and longevity matter.

It is less ideal for someone who only needs one or two odd sizes infrequently; a single-purpose core or a rental may be more economical for a one-off job. Also, users of hammer drills must remember to turn off hammer mode and follow the recommended RPM range to avoid damage.

Pros & Cons

Pros

• Wide size selection covers small pilot holes to large 65mm cores for fixtures and pipes.
• Triangular shank improves grip and reduces slipping in drill chucks for neater holes.
• Vacuum brazed diamond surface increases durability and cutting speed for stone and tile.
• Chamfer finger bit provides finishing options to clean and bevel hole edges after cutting.

Cons

• Not optimized for hammer drilling; users must disable hammer mode and run at recommended speeds which may be slower than expected for some handheld drills.
• The set is broad rather than specialized, so occasional users may not use every size.

Specifications

Kit contents	12 diamond core bits, 1 diamond chamfer finger bit, 1 6mm carbide tip drill bit
Core sizes	6, 6, 8, 20, 25, 28, 35, 45, 50, 65mm (includes duplicate 6mm and 50mm chamfer)
Shank type	Triangle shank for stable clamping
Recommended RPM	2000-5000 RPM (max 5000 RPM)
Materials	Diamond particles with vacuum brazing; carbide pilot bit
Compatible materials	Porcelain tile, ceramic tile, granite, marble, masonry

Our Verdict

The BGTEC Diamond Core Drill Bit Kit is a practical value for professionals and serious DIYers who regularly cut holes in tile or stone. The triangular shank and vacuum brazed diamonds give better durability and cleaner holes than basic plated bits, and the chamfer bit adds useful finishing capability. For a single affordable kit covering many common hole sizes, it is a good investment when you need reliable cores and finishing options.

Frequently Asked Questions

Can these bits be used wet or dry?
Yes, the kit is designed for both wet and dry drilling, though wet cutting will extend bit life and reduce dust.

Will these work in a hammer drill?
They can be used in most drills, but you must turn off hammer mode and follow the recommended RPM range to avoid damage.

Does the set include a pilot bit?
Yes, a 6mm carbide tip drill bit is included for pilot holes and guiding the diamond cores.