The Diablo DHS0250DG 1/4 in. Diamond Grit Hole Saw is a small-diameter diamond grit hole saw built for drilling clean holes in tile, stone, and glass. This is a hole saw designed for boring small, precise openings in hard brittle materials. Model Number: DHS0250DG. If you are working on finished surfaces where chipping is a problem and standard toothed hole saws are the wrong choice, this is the right type of cutter for the job.

What makes this one useful is the combination of a diamond grit cutting edge and a continuous rim. The diamond grit helps with longer life and faster material removal in hard materials, while the continuous rim helps keep the cut smoother and reduces chipping in masonry-style applications. On tile, glass, marble, and similar surfaces, that cleaner edge is the difference between a professional result and a cracked piece you have to replace.

Diablo also builds in an integrated wax lubricant. That matters more than it sounds. Friction and heat are what shorten the life of a diamond hole saw and make hard materials more likely to chip or fracture. The wax helps cool the cutting edge and reduce heat build-up while drilling, which can help the cutter stay productive longer through repeated holes.

This hole saw does not require a pilot bit. Instead, Diablo recommends starting the cut at roughly a 45-degree angle or using a jig to get the edge to bite before bringing the tool upright. That approach is common with diamond grit hole saws and makes sense on slick surfaces like porcelain tile or glass, where a pilot can do more harm than good. Once it starts tracking, you get a more controlled cut without needing a center drill.

The shank is a 1/4 in. hex, and the product is designed for use with a hand-held drill. It is also compatible with Diablo Snap-Lock Plus mandrel systems for quick cup changes. If you already use that setup, this saw drops into the same workflow and makes switching sizes faster when you are moving from one hole location to the next.

At 1/4 in. diameter, this is a specialized size for small pass-throughs and precision work rather than large plumbing or fixture openings. It is a good fit for tile installers, remodelers, glass and stone work, and tradespeople who need a clean small hole in brittle material without blowing out the finish. If you are drilling wood, framing lumber, or general rough materials, this is not the right cutter. If you are drilling porcelain, ceramic, granite, marble, slate, or glass, it is exactly the kind of accessory you want in the case.

Diablo DHS0250DG 1/4 in. Diamond Grit Hole Saw for Small, Clean Holes

This is the kind of specialty hole saw you buy when clean results in hard finished material matter more than brute speed.

• Who it's for: Tile installers, remodelers, plumbers, and anyone drilling small holes in porcelain, ceramic, glass, or stone.
• Why it stands out: The diamond grit edge, continuous rim, and wax lubricant are the right combination for cleaner cuts and better life in brittle materials.
• Worth knowing: This is a specialized cutter for tile, stone, and glass, and it is designed to work with Diablo Snap-Lock Plus mandrel systems. Start it correctly at an angle and it will treat finished surfaces a lot better than a standard toothed hole saw.

• What materials can this hole saw drill? It is designed to drill porcelain tile, ceramic tile, granite, marble, slate, and glass.
• Does it use a pilot bit? No. Diablo states no pilot bit is needed. Start the cut at about a 45-degree angle or use a jig.
• What drill does it fit? It has a 1/4 in. hex shank, requires a minimum 1/4 in. chuck size, and is intended for use with a hand-held drill.
• Is it compatible with Diablo mandrels? Yes. It is compatible with Diablo Snap-Lock Plus mandrel systems for quick cup changes.