--- product_id: 256431332 title: "2pcs 1-Inch / 25mm Diamond Drill Bits, Small Diamond Hole Saw Hollow Core Drill Bits for Glass Ceramic Porcelain Tiles Marble Granite Quartz" brand: "phituoda" price: "€ 16.42" currency: EUR in_stock: true reviews_count: 13 category: "Phituoda" url: https://www.desertcart.it/products/256431332-2pcs-1-inch-25mm-diamond-drill-bits-small-diamond-hole store_origin: IT region: Italy --- # Diamond-coated precision High-speed steel durability Versatile multi-surface use 2pcs 1-Inch / 25mm Diamond Drill Bits, Small Diamond Hole Saw Hollow Core Drill Bits for Glass Ceramic Porcelain Tiles Marble Granite Quartz **Brand:** phituoda **Price:** € 16.42 **Availability:** ✅ In Stock ## Summary > 💎 Drill like a pro, cut like a diamond—don’t get left behind! ## Quick Answers - **What is this?** 2pcs 1-Inch / 25mm Diamond Drill Bits, Small Diamond Hole Saw Hollow Core Drill Bits for Glass Ceramic Porcelain Tiles Marble Granite Quartz by phituoda - **How much does it cost?** € 16.42 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/256431332-2pcs-1-inch-25mm-diamond-drill-bits-small-diamond-hole) ## Best For - phituoda enthusiasts ## Why This Product - Trusted phituoda brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Risk-Free Confidence:** 90-day hassle-free money-back guarantee backed by top-rated customer service. - • **Multi-Material Mastery:** Effortlessly drill through porcelain, marble, granite, quartz, and more—expand your project possibilities. - • **Smooth & Cool Drilling:** Thick diamond dust coating plus water lubrication reduces heat and prevents chipping. - • **Precision Perfect 25mm Cut:** Achieve flawless 1-inch holes in glass, ceramic, and stone with diamond-tipped accuracy. - • **Built to Last with HSS & Nickel:** High-speed steel core with corrosion-resistant nickel plating ensures long-lasting performance. ## Overview This 2-piece set of 1-inch (25mm) diamond drill bits from PHITUODA features high-speed steel cores with nickel plating for corrosion resistance and durability. Designed for precision cutting on glass, ceramic, porcelain, marble, granite, and quartz, these bits deliver smooth, chip-free holes thanks to a thick diamond dust coating and optimized cooling with water lubrication. Ideal for professional and DIY projects, they come with a 90-day money-back guarantee, making them a reliable choice for millennial managers who demand quality and efficiency. ## Description Product description Review: Appears flimsy at first, gets the job done and holds up better than expected - very light weight yet strong. was slower to get hot than more expensive ones I have used. used on porcelain tile and they did the job well. Unlike some of the other drill bits, these were not overly encrusted with diamonds. The trade off: Less durability, higher precision in hole diameter. Review: Works Well on Terracotta - This bit was a great value because it performed exactly as I had hoped. I used the bit to drill a hole to insert a spigot into a terracotta planter. The pot will be used with a rainchain to collect and divert roof runoff water. I used a regular handheld drill on fast speed at first to make an indentation into the pot and then I used slow speed to drill the hole. I poured water over the area about every 5 seconds to keep the pot from cracking. I found the bit easy to use because I didn't even have to press hard with the drill and I have small hands and am not partcularly strong. The hole (lol) process took less than five minutes and the bit seems barely worn. In the pictures, the worn bit is on the left. I used size 25mm for a 1 inch hole but had to enlarge the hole slightly because of the threads on the spigot; the 26mm bit would have worked better. I think I got my money's worth. ## Features - *Package Included: 2 x Diamond Drill Bits. Cutting Hole Diameter is 1"/ 25mm, Shank Diameter is 5/16" / 8.05mm, Total Length is 2.19" / 55.6mm. - *Quality Selection: These diamond drill bits are made of high-speed steel which is high quality and durable. With a nickel-plated coated body to resist corrosion, which has a long service life. Large chip holes to ensure that when the punching smooth, punching accurate. - *Smoothly Cutting: A thicken diamond dust coating on the tops offers superior cutting strength for creates a high precision, smooth cut with no broken edges. Reduced drill speeds, low drill pressure, and increased use of water lubrication will extend drill bit life considerably. - *Multiple Applications: The diamond drill bit can remove a complete 25mm diameter hole on glass, tiles, granite, ceramic. In addition to cutting holes for glass, the Hole Saw comes in handy for tile bottles, blocks jars, fiberglass, porcelain tile, ceramic, slate, marble, light stone. Not for use on Concrete or for depths beyond about 1/2". - *Hassle-Free Guarantee: PHITUODA's products can only be packed and shipped after strict quality inspection. If you are not satisfied within 90-days, send 1 simple email and receive a 100% money-back refund. We're so confident you will love our products like our other 5-star reviewers! You will be amazed at the customer service you receive after the sale! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08CX83W46 | | Best Sellers Rank | #33,626 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #19 in Core Drill Bits | | Brand | PHITUODA | | Brand Name | PHITUODA | | Customer Reviews | 4.3 out of 5 stars 863 Reviews | | Cutting Angle String | 45 Degrees | | Cutting Diameter | 25 Millimeters | | EU Spare Part Availability Duration | 90 Days | | Finish Type | Nickel | | Finish Types | Nickel | | Item Dimensions | 2.19 x 1 x 0.1 inches | | Manufacturer | PHITUODA | | Material | Diamond, High Speed Steel (HSS) | | Material Type | Diamond, High Speed Steel (HSS) | | Model | TUOR1346 | | Number of Flutes | 2 | | Number of Pieces | 2 | | Part Number | TUOR1346 | | Set Name | 2-Piece | | Shank Type | Straight | | Surface Recommendation | Glass, Ceramic, Porcelain, Marble, Granite, Quartz | | Tool Flute Type | Straight | | Unit Count | 2.0 Count | ## Images ![2pcs 1-Inch / 25mm Diamond Drill Bits, Small Diamond Hole Saw Hollow Core Drill Bits for Glass Ceramic Porcelain Tiles Marble Granite Quartz - Image 1](https://m.media-amazon.com/images/I/61X5lN4P7lL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Appears flimsy at first, gets the job done and holds up better than expected *by P***T on April 24, 2026* very light weight yet strong. was slower to get hot than more expensive ones I have used. used on porcelain tile and they did the job well. Unlike some of the other drill bits, these were not overly encrusted with diamonds. The trade off: Less durability, higher precision in hole diameter. ### ⭐⭐⭐⭐⭐ Works Well on Terracotta *by T***N on May 10, 2025* This bit was a great value because it performed exactly as I had hoped. I used the bit to drill a hole to insert a spigot into a terracotta planter. The pot will be used with a rainchain to collect and divert roof runoff water. I used a regular handheld drill on fast speed at first to make an indentation into the pot and then I used slow speed to drill the hole. I poured water over the area about every 5 seconds to keep the pot from cracking. I found the bit easy to use because I didn't even have to press hard with the drill and I have small hands and am not partcularly strong. The hole (lol) process took less than five minutes and the bit seems barely worn. In the pictures, the worn bit is on the left. I used size 25mm for a 1 inch hole but had to enlarge the hole slightly because of the threads on the spigot; the 26mm bit would have worked better. I think I got my money's worth. ### ⭐⭐⭐⭐ OK for a few holes *by K***C on June 5, 2025* These work great for 1 or 2 holes but after that, they get really dull & don't work --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.it/products/256431332-2pcs-1-inch-25mm-diamond-drill-bits-small-diamond-hole](https://www.desertcart.it/products/256431332-2pcs-1-inch-25mm-diamond-drill-bits-small-diamond-hole) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-06-23*