Parts List: 1 x Drill Bit Extender 1 x Wrench or 3 x Drill Bit Extenders 3 x Wrenches Highlight description: Quality Material: Our drill bit extensions are made of quality steel material, with sturdy structure, not easy to break or damage. Precision grinding and polishing ensures that it can be used for a long time Easy to Use: The drill bit extension includes two fix screws and hexagonal spanner. To secure the shank in place, tighten these screws with the hexagonal spanner, easy to use Function: Our drill bit extension allows you to extend any shank drill bit extra long to help you drill flat holes with a standard drill bit or start a deep hole turning project, such as on larger vases or containers Extension Length: The 1 piece set extends the shank drill bit an additional 8+3/4 inches, while the 3 piece set extends the shank drill bit an additional 8+3/4 inches to 5+3/8 inches Compatibility: 1 piece set chuck has a 3/8 inch inside diameter for drills with shank sizes of 3/8 inch or slightly smaller. 3 piece set chuck have 3/8 inch and 2/5 inch inside diameters for drills with shank sizes of 2/5 inch; 3/8 inch or slightly smaller Detailed description: Description: Made of premium steel material, this drill bit extension is sturdy and wear resistant for long term use. Designed with 2 style set for you to choose according to your needs. Great for extending any shank drill bit extra long to help you drill flat holes with a standard drill bit or start a deep hole turning project. Key Feature: Fix Screw: The drill bit extension is designed with fix screws, which helps secure the shank in place for efficient extending working. Specification: Product Name: Drill Bit Extension Material: Steel Color: Silver Size: 1Pc: Shank Diameter: 3/8in, Overall Length: 10in, Extended Length: 8+3/4in 3Pcs: Shank Diameter: 2/5in or 3/8in, Overall Length: 6.6in, 7in, 10in, Extended Length: 8+3/4in Or 5+3/8in 254mm Size: Full Length 254mm/10in; Shank Diameter: 9.35mm/0.37in; Internal Diameter: 9.7mm/0.38in 169mm Size: Full Length 169mm/6.6in; Shank Diameter: 9.35mm/0.37in; Internal Diameter: 10.5mm/0.41in 178mm Size: Full Length 178mm/7in; Shank Diameter: 9.35mm/0.37in; Internal Diameter: 9.7mm/0.38in Note: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement. Function: Our drill bit extension allows you to extend any shank drill bit extra long to help you drill flat holes with a standard drill bit or start a deep hole turning project, such as on larger vases or containers Quality Material: Our drill bit extensions are made of quality steel material, with sturdy structure, not easy to break or damage. Precision grinding and polishing ensures that it can be used for a long time Easy to Use: The drill bit extension includes two fix screws and hexagonal spanner. To secure the shank in place, tighten these screws with the hexagonal spanner, easy to use Extension Length: The 1 piece set extends the shank drill bit an additional 8+3/4 inches, while the 3 piece set extends the shank drill bit an additional 8+3/4 inches to 5+3/8 inches Compatibility: 1 piece set chuck has a 3/8 inch inside diameter for drills with shank sizes of 3/8 inch or slightly smaller. 3 piece set chuck have 3/8 inch and 2/5 inch inside diameters for drills with shank sizes of 2/5 inch; 3/8 inch or slightly smaller