Looking for a reliable 7/8 inch (22 mm) diamond hole saw to create clean, precise holes in tile, porcelain, granite, glass, or stone? This guide highlights five top options designed for both DIY projects and professional jobs. Each pick is evaluated for best use cases, potential limitations, and why it’s a strong match for specific buyers.
The following quick-reference table helps compare the five selections at a glance.
- Product: 7/8″ Diamond Hole-Saw Bits with Pilot Drill Bit – 2pc — DKIBBITH
- Best for: DIYers and homeowners drilling into tile, porcelain, and light stone
- Key benefit: Pair of bits with guiding pilot bit for accuracy
- Limitations: May require wetting for best performance on hard materials
- Product: 7/8 Inch Diamond Hole Saw with Pilot Bit — DaduoRi
- Best for: Deeper cuts in granite, porcelain, and ceramics without frequent re-centered drilling
- Key benefit: Removable center pilot bit for flexible use
- Limitations: Needs consistent cooling to maximize life
- Product: 7/8 Inch Diamond Hole-Saw Bits with Pilot Drill Bit — DECKRKAT
- Best for: Concrete countertops, brickwork, and mixed hard surfaces
- Key benefit: Wet/dry design with guided drilling
- Limitations: Two-pack set; may be bulkier to store
- Product: Dry Diamond Core Drill Bits 7/8 Inch — DKIBBITH
- Best for: Dry drilling in dry environments on porcelain and tile
- Key benefit: Heavy-duty core design with 5/8-11 threading
- Limitations: Dry-use only; avoid hammer mode
- Product: Jamiikury 7/8″ Diamond Drill Bit — Pack of 2
- Best for: Budget-conscious buyers needing two reliable bits
- Key benefit: Nickel-coated coating for corrosion resistance
- Limitations: Dry drilling not recommended; ensure water cooling during use
7/8″ Diamond Hole-Saw Bits with Pilot Drill Bit (2pc) — DKIBBITH
The DKIBBITH 7/8″ hole saw set includes two diamond-tipped saws with a guiding pilot bit. The diamond height is 3/8″, and each bit runs 2-1/2″ in total length with a cutting depth of 1-3/8″. This configuration supports drilling through ceramic, porcelain tile, granite, stone, glass, and pottery.
Best for: DIYers tackling faucet holes, bathroom remodels, or hardware installations in ceramic or light granite textures. A paired pilot bit supports precise starts, reducing wander in hard surfaces.
Caution: For best results, maintain consistent lubrication during cutting and avoid overheating. A wet-drill approach may extend bit life on dense materials.
7/8 Inch Diamond Hole Saw With Pilot Bit — DaduoRi
The DaduoRi set features a removable center pilot bit and triple-layer diamond coating for enhanced performance. The cutting depth is 1-3/8″, matching the common need for mid-thickness countertops and tile installations. The kit emphasizes compatibility with granite, ceramics, porcelain, marble, glass, and stones.
Best for: Professionals and serious DIYers who want a flexible tool with a removable pilot bit, enabling deeper cuts and easier bit changes on hard materials.
Caution: The driver must be kept cool; excessive speed or lack of lubrication can shorten tool life, especially on dense stone.
7/8″ Diamond Hole-Saw Bits With Pilot Drill Bit — DECKRKAT
DECKRKAT offers a two-piece set of premium 7/8″ diamond-tipped hole saws with a central guiding pilot drill. These bits are designed for ceramic, porcelain, granite, stone, glass bottles, and concrete countertops. A wet/dry capability helps expand their use beyond moisture-restricted environments.
Best for: Contractors and DIYers who need dependable, dual-hole saws with central pilots for straight drilling in multiple hard substrates.
Caution: Mild wobble can occur if the pilot bit alignment is not perfectly centered; verify alignment before drilling at high speed.
Dry Diamond Core Drill Bits 7/8 Inch — DKIBBITH
These 7/8 inch dry diamond core bits feature a 5/8-11 thread compatible with popular angle grinders, plus a 3/8 inch hex shank adapter for drills. The dry-cut capability supports porcelain, tile, granite, marble, stone, masonry, and non-reinforced concrete. Maximum cutting depth is 1-5/8 inches (40 mm).
Best for: Users working in dry environments or with angle grinders who need to drill without water cooling. Suitable for quick cuts on tile and stone when moisture is not available.
Caution: Do not use on hammer mode; wet cooling is recommended when drilling dense materials to extend bit life.
Jamiikury 7/8″ Diamond Drill Bit — Pack of 2
Jamiikury provides two 7/8″ diamond hole saws with a nickel coating for corrosion resistance. The kit emphasizes high-precision cutting with water lubrication during use. Total length is 2 inches (50 mm) with a hole diameter of 7/8″.
Best for: Budget-minded buyers seeking two reliable bits for consistent tile, porcelain, or glass cutting. Water cooling is recommended to maintain tool life.
Caution: Dry drilling is discouraged for this product; ensure continuous cooling during operation to maximize bit life.
Diablo DHS0875DG Diamond Grit Hole Saw (7/8″)
Diablo’s 7/8″ hole saw uses a diamond grit design with a continuous rim for longer life and faster material removal. It’s suited for porcelain, ceramic tile, granite, marble, slate, and glass, delivering precise performance. An open-slot design aids plug removal for easier maintenance.
Best for: Professionals needing smooth cuts with reduced chipping on varied masonry materials. Ideal for frequent use in tile and stone projects.
Caution: The open-slot configuration, while convenient, requires careful cleaning after use to prevent clogging from debris.
TurstAid 7/8 Inch Diamond Hole Saw With Pilot Guide Bit
TurstAid combines a heavy-duty carbon steel body with quality diamond grits. The pilot center drill bit helps prevent slipping, enabling precise holes in tiles, porcelain, glass, and ceramics. A larger lateral clearance hole allows faster cooling and chip removal.
Best for: Those who value precise starts and easier chip evacuation, especially on glossy or heavily glazed surfaces.
Caution: As with many diamond tools, consistent lubrication and steady feed rates yield the best results and longer tool life.
Luomorgo 2-Pack 22mm Diamond Hole Saw Sets
This Luomorgo package includes two 7/8″ (22 mm) diamond hole saws with a 1.18″ (30 mm) cutting depth and a 0.32″ (8 mm) shank. It supports glass, ceramic, porcelain, marble, granite, and other stone-like materials. The bit is nickel-plated for rust resistance and increased durability.
Best for: Users who want multiple bits with ample cutting depth for thick materials. The nickel-plated surface helps extend life in damp environments.
Caution: Ensure water cooling during use to maintain cutting speed and prevent overheating of the bit edge.
Buying Guide: Key Considerations For 7/8 Inch Diamond Hole Saws
- Material compatibility: Choose bits designed for the material you drill—ceramic, porcelain, granite, marble, glass, or stone all have different hardness levels.
- Cutting depth and shank: Verify cutting depth (common is around 1-1/4″ to 1-3/8″) and ensure your drill or grinder accepts the shank size and threading.
- Cooling method: Wet cutting or water cooling typically extends life on dense materials. Dry-cut options exist but may wear faster.
- Pilot bit usefulness: Pilot bits improve initial alignment and reduce wandering on hard surfaces.
- Removable pilot bit: Some sets allow removing the center bit for deeper or less-guided cuts; useful for certain installations.
- Mounting compatibility: Check thread size (5/8-11 is common) or hex shank compatibility for your grinder or drill.
- Durability features: Look for triple-layer coatings or diamond grit quality, which influence speed, finish, and service life.
- Cost vs. usage: If a project is a one-time job, a bundled two-piece set with pilots can save time. For frequent use, prioritize longevity features and cooling compatibility.
Frequently Asked Questions
- Q: Can I use these hole saws on porcelain tile without water cooling?
- A: Water cooling is recommended for porcelain to prevent overheating and edge wear.
- Q: What materials can a 7/8″ diamond hole saw drill into effectively?
- A: Ceramic, porcelain tile, granite, marble, glass, stone, and similar hard substrates.
- Q: Do these sets include pilot bits?
- A: Many sets include pilot bits; verify each product’s features to confirm.
- Q: Is a removable pilot bit beneficial?
- A: Yes, it provides flexibility for deeper cuts or different drilling contexts.
- Q: What is the typical cutting depth for these bits?
- A: Most options offer around 1-1/4″ to 1-3/8″ cutting depth, with some models offering deeper cuts.