The 1-piece set extends the shank drill bit an additional 8+3/4 inches. Our drill bit extensions are made of high-quality steel, with a sturdy structure that resists breaking or damage. Precision grinding and polishing ensure long-term durability. The drill bit extension includes two fixed screws and a hexagonal spanner. Tighten the screws with the spanner to securely hold the shank in place. This extension allows you to lengthen any shank drill bit, enabling flat-hole drilling with a standard drill bit or initiating deep-hole turning projects, such as on large vases or containers. The chuck has a 3/8-inch internal diameter, compatible with drill bits having a 3/8-inch shank or slightly smaller. Made of premium steel, this drill bit extension is sturdy and wear-resistant for long-term use. It is designed to extend any shank drill bit for improved reach and functionality. Fixed screws secure the shank firmly to ensure stable and efficient operation. Product Name: Drill Bit Extension Type: 1-Piece Set Color: As Shown Material: Metal Package Contents: 1 x Drill Bit Extender 1 x Wrench Note: Light reflection and display differences may cause slight color variation between the image and the actual item. Measurement tolerance is ±1–3 cm.