Best 7/8-Inch Diamond Hole Saws for Tile, Stone, and Glass
The best 7/8-inch diamond hole saw depends on the material, drilling method, and tool connection you need. DECKRKAT is a practical choice for buyers who want two pilot-guided bits; DKIBBITH lists a deeper cutting capacity and useful dimensions; and Diablo is suited to shoppers seeking a pilot-free design. For angle grinders or compatible wet polishers, the DKIBBITH dry core bit has a threaded connection and adapter.
| Product | Best For | Notable Feature |
|---|---|---|
| DECKRKAT 2-Piece Set | Buyers wanting two pilot-guided bits | Wet/dry design with water cooling |
| DKIBBITH Pilot-Bit Set | Deeper tile and countertop holes | Listed cutting depth of 1-3/8 inches |
| DaduoRi Diamond Hole Saw | Users who want a removable pilot bit | Triple-layer diamond coating |
| DKIBBITH Dry Core Bit | Angle-grinder or adapter use | 5/8-11 thread and hex-shank adapter |
| Diablo Diamond Grit Hole Saw | Users who prefer no pilot bit | Continuous rim and open slot |
DECKRKAT 2-Piece Diamond Hole-Saw Set
This set includes two 7/8-inch diamond-tipped hole saws and centrally placed guiding pilot drill bits. The listed applications include ceramic and porcelain tile, pottery, granite, stone, glass bottles, concrete countertops, and brickwork. Its wet/dry core design is described as supporting water cooling.
Best for: DIYers or contractors who want a two-bit set with a guiding pilot for positioning. It is a useful option when working across several listed hard materials. Limitation: The product details do not specify cutting depth or shank dimensions, so check those requirements before choosing it for a particular tool or thick workpiece.
DKIBBITH Pilot-Guided Tile Hole-Saw Set
This two-piece set includes pilot drill bits and is listed for porcelain, ceramic, granite, stone, and glass. The product details give a 1-3/8-inch cutting depth, a total length of 2-1/2 inches, and a diamond height of 3/8 inch. Suggested tasks include countertop openings for faucets and other home-improvement holes.
Best for: Buyers who need a pilot-guided 7/8-inch bit and want stated size and depth specifications for planning. Limitation: Its listed cutting depth is 1-3/8 inches; choose a different option if the required cut exceeds that depth.
DaduoRi Diamond Hole Saw With Removable Pilot
DaduoRi’s 7/8-inch hole saw has a removable center pilot bit and triple-layer diamond coating. The listed cutting depth is 1-3/8 inches. Product applications include granite, ceramic, porcelain tile, marble, glass, and stone. The removable pilot design gives buyers the option to use the bit without a fixed center guide.
Best for: Users who want a pilot bit that can be removed and need a stated cutting depth for tile or stone work. Limitation: The provided product details do not give shank or connection dimensions, so verify that the bit matches your drill before buying.
DKIBBITH Dry Diamond Core Drill Bit
This 22 mm core bit has a female 5/8-11 thread for compatible angle grinders and wet polishers. The package also includes a 5/8-11-to-3/8-inch hex-shank adapter for electric drills. Its listed maximum cutting depth is 1-5/8 inches, and the product is described for wet or dry drilling in tile, granite, marble, stone, masonry, and other materials.
Best for: Buyers who need a threaded core bit or want the listed adapter option for an electric drill. Limitation: The product details say not to use the adapter and core bit in hammer mode. Confirm the connection and operating method before use.
Diablo Diamond Grit Hole Saw
Diablo’s 7/8-inch diamond grit hole saw uses a continuous rim and does not require a pilot bit. Listed materials include porcelain and ceramic tile, granite, marble, slate, and glass. An open slot is designed to make plug removal easier, and the product is described as compatible with the Snap-Lock Plus mandrel system and handheld drills.
Best for: Users who prefer a pilot-free bit and value a design with an open slot for clearing the cutout. Limitation: It does not include a pilot bit, so buyers who rely on a center guide should choose a pilot-equipped option instead.
Buying Guide: How to Choose a 7/8-Inch Diamond Hole Saw
Do you need a pilot bit?
A pilot bit can help guide placement when starting a hole. DECKRKAT and DKIBBITH offer pilot-guided sets, while DaduoRi lists a removable pilot. Diablo is the pilot-free choice among these picks. Match the design to your preferred drilling approach and the workpiece.
What cutting depth do you need?
Compare the hole saw’s stated cutting depth with the thickness of the material. The DKIBBITH pilot-bit set lists 1-3/8 inches, while the DKIBBITH core bit lists a maximum depth of 1-5/8 inches. The other product details here do not provide a depth, so confirm it with the seller if depth is essential.
How does the bit connect to your tool?
Check the shank or thread before purchase. The DKIBBITH core bit specifies a female 5/8-11 thread and includes a hex-shank adapter. Other listings do not state full connection dimensions in the supplied product details. Do not assume a bit fits your drill without checking.
Will you drill wet or dry?
Some listed products describe wet/dry use, but the recommended method can depend on the bit and material. The DKIBBITH core bit is explicitly described for wet or dry drilling, with a warning against hammer mode when using its adapter. Follow the product instructions and use suitable cooling where required.
Frequently Asked Questions
What does 7/8 inch equal in millimeters?
Seven-eighths of an inch is approximately 22 millimeters. Several products in this selection list the size as 22 mm.
Can a 7/8-inch diamond hole saw cut porcelain tile?
Several products listed here specify porcelain tile among their applications. Check the individual product’s tool connection, depth, and operating instructions before drilling.
Should I choose a pilot-bit or pilot-free hole saw?
Choose a pilot-bit model if you want a center guide for positioning. A pilot-free design may suit users who prefer not to use a center bit, but the right choice depends on the work setup.
Can I use the DKIBBITH core bit in hammer mode?
No. Its product details specifically say not to use the adapter and core bit on hammer mode.