BRSCHNITT Diamond Chamfer Bit 5/8-11 Thread

If you’re choosing between making a new opening and tidying up one that already exists, this bit is designed for the second job. It’s intended to enlarge, shape and bevel existing holes in materials such as marble, granite, glass, ceramic and porcelain tile, rather than drill through an uncut surface. If you prioritise refining a rough tile opening, that’s its role, if you need to create a hole from scratch, you’ll need a different tool.

For example, it could help smooth and chamfer an existing opening for plumbing or a light fitting, where a rough edge or tight fit is a concern.

Getting the most from it

Use it with an angle grinder to work on an existing opening, gradually shaping or trimming the edge rather than treating the bit like a conventional hole saw. The listing says it can be used with water or without it. That gives you a choice of working approach, but no further guidance is provided on water use, so follow the requirements for your grinder and the material you’re working on.

The stated #80 grit is intended for granite, marble and tiles. The listing also describes chamfering as a way to relieve stress around rough openings and reduce the risk of cracking in tile under tension, such as around tightened plumbing. That’s a useful aim, not a guarantee against breakage: material condition, support and how the opening is worked still matter.

Why it’s worth it

A single shaping bit may be more practical than buying separate tools for several opening sizes, particularly if you already have an angle grinder and mainly need to finish holes rather than make them. It can also be useful when a cutout is present but needs its edge tidied or its shape adjusted. The diamond construction and stated grit make this a finishing and adjustment tool in the listing’s terms, not a general-purpose drill bit.

There is a sizing detail worth taking seriously before ordering: the product name refers to 1-3/8" (35mm), while another part of the description lists a 2-inch (50mm) bit and gives a 46mm workable length. Those details do not agree, so the exact size supplied is unclear from the information provided. The listing does specify a 5/8-11 thread, make sure that matches your setup rather than assuming it will fit any grinder.

The essentials

The intended use is enlarging, shaping and beveling existing holes in tile and stone, with glass also named in the description. It is not intended to drill new holes. The listed grit is #80, the thread is 5/8-11, and the stated machine is an angle grinder. The description mentions use with or without water, but does not provide further operating instructions or a clear, consistent size specification.

It suits you if you need to refine an existing opening and already have a compatible angle grinder. Better avoid it if your job starts with an uncut surface, or if you need the supplied dimensions to be certain before choosing a bit.

When to choose it

Choose this BRSCHNITT bit when the hole is already there and the task is to ease, enlarge or clean up its edge in tile or stone. That is a more focused purchase than a bit meant to drill from scratch, and it may save buying several tools if you only need to adjust existing openings. Skip it for new holes, and be cautious if a precise diameter is essential: the listing gives conflicting size details, which leaves an important part of the buying decision unresolved.