Saipor 6.8 inch Long Forstner Bit Extension, Adding Over 5.6 inch of Drilling Depth to Your Forstner Bit, 3/8-inch Shank Dia, for Wood Turners, Furniture, Carpentry and Construction

• Shank Dia.: 3/8-inch, Total length: 6.8 inch/173 mm, Extend Length: 5.6 inch/143 mm. The minimum size hole this extension will allow to drill is 0.8 inch
• Premium Materials: the forstner bit extension is made of high-carbon steel, which has excellent durability and reliability, not easy to bend and break
• Suitable for: When we need to drill deeper holes in certain types of wood, normal Forstner bits are often not long enough. So we offer an extension that allows you to drill holes up to 5.6" deep. Installation is simple
• Wide Applications: This extension helps you use standard forstner drill bits drilling for flat bottom holes or start deep hole turning projects like on larger vases or containers; can be used with forstner bits on drill presses, lathes with a drill chuck installed (drill chuck not included) or with a power drill
• Note: The collet inside diameter is 3/8 inch(9.5mm). This tolerance is very tight and designed to accept forstner bits with shank sizes of 3/8 inch or slightly smaller; Tighten the screw before use to prevent the drill bit from slipping when rotating at high speed

Features High-carbon steel construction, precision ground and polished, ensuring it's sturdy and durable The collet inside diameter is 3/8 inch(9.5mm). This tolerance is very tight and designed to accept forstner bits with shank sizes of 3/8 inch or slightly smaller Please note that Forstner drill bits should be larger than 0.8" in diameter to prevent the protruding part of the set screw from scratching the hole wall when drilling. Two set screws and hex key included. To fasten the shank in place, use the hex key to tighten these screws