--- product_id: 167006107 title: "10\" Forstner Bit 3/8 Shank Extension, Adds 8-1/2\" Drilling Depth" brand: "fulton" price: "6157 som" currency: KGS in_stock: true reviews_count: 8 url: https://www.desertcart.kg/products/167006107-10-forstner-bit-3-8-shank-extension-adds-8-1 store_origin: KG region: Kyrgyzstan --- # 8.5" reach 3/8" collet heavy-duty steel 10" Forstner Bit 3/8 Shank Extension, Adds 8-1/2" Drilling Depth **Brand:** fulton **Price:** 6157 som **Availability:** ✅ In Stock ## Summary > 🔧 Drill Deeper, Create Better! ## Quick Answers - **What is this?** 10" Forstner Bit 3/8 Shank Extension, Adds 8-1/2" Drilling Depth by fulton - **How much does it cost?** 6157 som with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/167006107-10-forstner-bit-3-8-shank-extension-adds-8-1) ## Best For - fulton enthusiasts ## Why This Product - Trusted fulton brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Unmatched Depth:** Achieve an impressive 8.5 inches of drilling depth for your woodworking projects. - • **Precision Engineering:** Crafted from solid, heavy-duty machined steel for durability and reliability. - • **Tight Tolerance Design:** Designed for a snug fit with 3/8 inch shank bits, ensuring optimal performance. - • **Versatile Compatibility:** Works seamlessly with forstner bits on drill presses, lathes, and power drills. - • **Perfect for Professionals:** Ideal for woodturners and contractors needing to bore deep holes with precision. ## Overview The Fulton 10-inch Long Forstner Bit Extension is engineered to enhance your drilling capabilities by adding over 8 inches of depth to your forstner bit. Made from heavy-duty machined steel, this extension is perfect for woodturners and contractors alike, allowing for precise and deep drilling in various projects. Compatible with 3/8 inch shank bits, it ensures a secure fit and optimal performance. ## Description Full description not available ## Features - Drilling with forstner bits to achieve a flat bottom hole or to start a deep hole turning project like on a larger vase or vessel is essentially impossible with a standard length forstner bit. To remedy this issue we have developed an extra long, heavy duty steel extension that allows you to secure a 3/8 inch shank forstner bit into the end collet. - The forstner bit extension gives you additional 8-1/2 inches of reach to bore deeper into your projects. This will help you create larger diameter starter holes or help when you need to drill in just a little further than the standard bit length will allow. The extension can be used with forstner bits on drill presses, lathes with a drill chuck installed (drill chuck not included) or with a power drill. - One of the most common uses for the forstner bit extension is for woodturners who need to bore out starter holes on larger vessels. However, the extension works exceptionally well for projects like salt shakers, pepper mills or even wood turned beverage mugs. Contractors use the extension when they need to bore deep holes for running cables or wires and they also use it for joining larger timbers. - The forstner bit extender is made from solid, heavy duty machined steel. It is designed to be used with forstner bits only. The collet inside diameter is 3/8 inch. This tolerance is very tight and designed to accept forstner bits with shank sizes of 3/8 inch or slightly smaller. Please note that some forstner bit manufacturers produce bits that say 3/8 inch shank size when in fact they are not. If you measure your bit shank and it is 3/8 inch, your bit should fit once the set screws are loosened - The collet outside diameter is 25/32 inch without the set screws protruding outward. The reason this is important is that as we mentioned earlier, some bits may have slightly different shank sizes. This means the set screws may protrude outwardly from the collet. The minimum size hole this extension will allow you to drill is 13/16 inch. Forstner bits and Machinery shown in pictures are NOT included. ## Product Details - **Material:** Alloy Steel - **Finish Type:** Steel - **Shank Type:** Straight - **Brand:** Fulton - **Surface Recommendation:** Wood,Steel ## Images ![10" Forstner Bit 3/8 Shank Extension, Adds 8-1/2" Drilling Depth - Image 1](https://m.media-amazon.com/images/I/711SrqGF6CL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ The bit extension is what I expected.and serves its purpose. *by T***N on October 6, 2021* It's durably built. You can tell it's well constructed when you first pick it up. The screws does hold the bit in place very securely. I found that to be the case even when only one of the two screws is used. But I due recommend using both when possible. As stated on Amazon. All 3/8 inch bits are not the same. I had three - one didn't fit at all, another only fit deep enough to reach one of the screw holes (which was sufficient), a third one fit completely where both screws could be used to secure the bit. My suggestion would be to get the smallest 3/8 inch shank you can find or get the one that's from the manufacturer of the extension. The one that fits perfectly I found at Ace Hardware, so that's another option. The others I had came from Harbor Freight Tools and Home Depot. Not a kock on these great outlets, just saying their 3/8 shank don't appear to perfectly fit the extension from this manufacturer. ### ⭐⭐⭐⭐⭐ Awesome extension *by M***K on July 11, 2020* At first I was hesitant about whether or not it would work as described. Rest assured this tool is a quality piece that works as described.I use it to extend my Irwin wood auger bits. My bits have the faceted drive ends and they fit almost snugly into the Fulton bit extender. When the allen screws are tightened the unit runs with no apparent runout. I didn't try using a dial indicator on it but, I couldn't see or feel any wobble while drilling through 2 inch oak floor joists. YMMV ### ⭐⭐⭐⭐ 3/8" shank doubtful fit *by A***N on March 1, 2025* As other reviews describe perfectly, the extension is nice if it would actually fit 3/8" shank fostner bits. Unfortunately they undersized the opening for bits and is not compatible with most 3/8" shanks ## Frequently Bought Together - Fulton 10 inch Long Forstner Bit Extension for Adding Over 8" of Drilling Depth to Your Forstner Bit Ideal for Wood Turners Furniture Carpentry and Construction (3/8 inch Collet) - Fulton 6 inch Long Forstner Bit Extension for Adding Over 5-5/8 inches of Drilling Depth to Your Forstner Bit. for Wood Turners, Furniture, Carpentry and Construction - NICAVKIT 3 Inch Carbide Forstner Drill Bit, Carbide Tipped Forstner Bit for Hard Wood, Wood Drilling Bit Woodworking Hinge Cutter Tool Kits for Wood Plywood Plastic --- ## 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.kg/products/167006107-10-forstner-bit-3-8-shank-extension-adds-8-1](https://www.desertcart.kg/products/167006107-10-forstner-bit-3-8-shank-extension-adds-8-1) --- *Product available on Desertcart Kyrgyzstan* *Store origin: KG* *Last updated: 2026-07-21*