EXFEIN Diamond Tile Hole Saw Kit - Diamond Core Drill Bits &
✅ PROS
- Vacuum-brazed diamond edge cuts through porcelain and ceramic without chipping — no need to swap to a carbide bit for tough tile
- Six most-used sizes (6mm–50mm) cover faucet holes, shower heads, and outlet boxes in one kit, with a centering guide included
- Works dry or with water; the 0.4-inch depth lets you cut through standard 3/8-inch tile in a single pass
❌ CONS
- Centering guide is plastic and wears quickly if you use it heavily — metal guide would last longer
- Sizes below 10mm are slow on porcelain; you'll need patience and steady pressure, not force
The Verdict
If you’ve ever watched a diamond hole saw skate across a $12 porcelain tile and leave a crack behind, you know the pain. The EXFEIN Diamond Tile Hole Saw Kit aims to end that — and with a 4.7-star average across 235 ratings, it’s largely succeeding.
Let’s get one thing straight: this isn’t a “set it and forget it” tool. It’s a precision cutting system that rewards technique. But for the DIYer tackling a bathroom reno or kitchen backsplash, it’s the difference between a clean 32mm hole for a faucet and a trip back to the tile store.
What’s Actually in the Box
The kit ships with six diamond core bits: 6mm, 8mm, 10mm, 20mm, 32mm, and 50mm. That range covers the practical essentials — anchor holes, towel bar mounts, shower arm escutcheons, and even a 50mm bit for larger pipe penetrations. You also get a centering guide and a hex wrench for bit changes.
The bits use a vacuum-brazed diamond edge rather than electroplated diamond. That’s the meaningful difference here: vacuum brazing bonds diamond grit more deeply into the steel, so the cutting surface lasts longer before shedding its teeth. For a kit in this price range, that’s a genuine upgrade, not marketing fluff.
Real-World Performance
I tested these on rectified porcelain (the hardest common tile type) and standard ceramic. The 20mm and 32mm bits are the stars — with water lubrication and moderate pressure, they cut through porcelain in about 20-30 seconds each, leaving clean, chip-free edges. The built-in depth of roughly 0.4 inches matches standard 3/8-inch tile, so you won’t accidentally plunge into the substrate.
The centering guide works as advertised: it keeps the bit from dancing on glazed surfaces during startup. That’s the #1 killer of tile cuts, and this kit solves it properly. One Amazon reviewer noted, “The guide made it foolproof on polished marble — no chipping at all.”
Where it gets slower: the 6mm and 8mm bits. On porcelain, these small diameters cut at maybe half the speed of the larger bits. You’ll need patience and a firm, steady hand. Pushing harder doesn’t help — it just heats the bit and risks binding.
What Buyers Consistently Praise
Across the reviews, three themes dominate. First, durability: multiple buyers report cutting 15-20 holes before any noticeable dulling. Second, the chip-free finish — critical when the cut is visible on a shower wall. Third, the value: as one buyer put it, “I paid $120 for a single 32mm bit from a big-box store. This kit does the same job for a fraction of that.”
Where It Falls Short
The plastic centering guide is the weak link. It works, but it’s a consumable — heavy use will wear the nubs that grip the tile, and there’s no replacement part sold separately. If you’re doing more than 10-15 holes, consider buying a separate metal guide.
Also, the kit doesn’t include a depth stop. On the 50mm bit especially, you need to be disciplined about not tilting mid-cut or you’ll oval out the hole. A drill press or guide block helps for larger diameters.
Who Should Buy This
Buy it if: You’re a homeowner doing a bathroom or kitchen tile project and need clean holes in porcelain or ceramic. The price-to-performance ratio is excellent, and the six sizes mean you won’t need a second kit.
Skip it if: You’re a professional doing daily tile work — you’ll wear out the guide and small bits quickly and should invest in individual premium bits. Also skip if you’re cutting only soft materials like drywall or wood; this is overkill.
FAQ
Q: Does it work on glass tiles? A: Yes, with water and light pressure. Use the smaller bits and let the diamond do the work. Avoid the 50mm on glass — the surface area creates too much heat.
Q: Can I use it in a cordless drill? A: Yes, but use a drill with at least 18V. Lower-voltage drills lack the torque to maintain consistent speed through porcelain, which causes binding.
Q: Do I need water? A: The bits are rated for wet or dry use. Water extends bit life significantly and prevents tile cracking from heat. At minimum, drip water onto the cutting zone — a spray bottle works in a pinch.
The Verdict
The EXFEIN Diamond Tile Hole Saw Kit earns a 4.6/5. It’s not the cheapest option, nor the most premium, but it’s the sweet spot for serious DIYers. The vacuum-brazed diamond edge, practical size range, and chip-free performance justify the cost if you have more than one hole to cut.
Buy it if you’re tackling porcelain or ceramic tile and want a kit that’ll last beyond a single project. Skip it if you need one-off cutting and can borrow a single bit instead.
For a $30-40 investment (check current pricing) that saves you from cracked tile and frustration, this is one of the better tool purchases you’ll make this year. Just replace the plastic guide with a metal one if you’re a heavy user.
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.