QTJSZXXT 2-Pack Forstner Drill Bit Extension Kit - 4.5in & 7in Long, 3/8in Hex Shank

Extend Your Forstner Bits with Precision and Value

The QTJSZXXT 2-Pack Forstner Extension Kit is built to give you extra reach without sacrificing control. This pair includes two extensions designed for 3/8 inch shanks, offering a total length of 4.5 inches and 7 inches, with extended drilling depths of 3-1/4 inches and 5-3/4 inches. Two set screws and a hex key are included so you can secure the shank in place before you start the drill. The result is a smoother start and steadier guidance when you tackle flat-bottom holes or deeper projects.

What You Get

• 1 x Forstner extension with 3-1/4 inch drilling depth
• 1 x Forstner extension with 5-3/4 inch drilling depth
• 2 x set screws for a secure hold
• 1 x hex key for fast tightening

Rugged Build and Fit

• Hex shank diameter: 3/8 inch for stable mounting
• Total lengths: 4.5 inches and 7 inches; extended reach of 3-1/4 inches and 5-3/4 inches
• Made from rugged high carbon steel with precision grinding and a polished finish
• Note: inside diameter is 3/8 inch, so it fits Forstner bits with 3/8 inch or smaller shanks; tighten screws before use to prevent slipping

Practical Uses and Benefits

Extend the capability of your existing Forstner bits to work on taller pieces or larger containers. The longer reach is helpful when you start deep holes or need a steadier approach for turning shapes like vases or decorative boxes. While results depend on your setup, the kit offers a straightforward way to pursue deeper, cleaner pockets and flat-bottom holes with more consistency.

Usage Tips for Best Results

• Always tighten the extension screws with the included hex key before operation
• Confirm that your bit shank is 3/8 inch or smaller before mounting
• Use appropriate feed rate and speed to maintain control and prevent bit slip

Whether you are upgrading a workshop or tackling a one-off project, this value-packed set gives you extended reach and reliable performance without a large investment. Consider these extensions as a way to expand your possibilities while keeping your workflow simple and repeatable.