Parts List: 4xExtension Rods (One for Each of 60, 100, 150, 300 mm) Highlight description: [Compatibility] This screwdriver bit holder is compatible for electric drills, screwdrivers, impact drivers and a variety of other tools. It has a 1/4-inch hex shank design that expands the functionality of your device [Locking Function] The interface features a locking function to hold the drill bit firmly in place, preventing it from shaking or accidentally disengaging. It is equipped with powerful built-in magnet, and you can quickly and easily remove or replace the drill bit by simply pressing down on the drill head [Chrome Vanadium Steel Material] This drill bit extension is made of chrome vanadium steel material to ensure enduring and reliability for long-term use [Suitable for Tight Space] It is easy to use even in the tight space or confined areas. This bit holder provides convenience and efficiency whether you are working in a tight space or tackling a complex task [What You Get] The package includes 4pcs drill bit extensions and 4pcs PH2 bits (optional). It will meet your needs and upgrade your toolkit for a seamless drilling experience Detailed description: Description: This drill bit extension can hold the drill bit firmly in place and also easy to release or replace drill bits. It is reliable to use and compatible for electric drills, screwdrivers, impact drivers, and a variety of other tools. It is easy to use in the limited space. Feature: Easy to Replace: Our drill bit extender adapter is easy to remove and replace drill bits. It can prevent shaking or accidentally disengaging. Efficient Working: This screwdriver drill bit extender is convenient and efficient to use in the limited areas. It will meet your needs and provides a seamless drilling experience. Specification: Product Name: Drill Bit Extension Set Material: Chrome Vanadium Steel Extension rod size: 60, 100, 150, 300mm; shank diameter: 6.3mm (1/4inch) PH2 bit size: 25×7×6.35mm Color: Red Quantity (Optional): 4Pcs/Set, 8Pcs/Set Notes: 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. [Compatibility] This screwdriver bit holder is compatible for electric drills, screwdrivers, impact drivers and a variety of other tools. It has a 1/4-inch hex shank design that expands the functionality of your device [Locking Function] The interface features a locking function to hold the drill bit firmly in place, preventing it from shaking or accidentally disengaging. It is equipped with powerful built-in magnet, and you can quickly and easily remove or replace the drill bit by simply pressing down on the drill head [Chrome Vanadium Steel Material] This drill bit extension is made of chrome vanadium steel material to ensure enduring and reliability for long-term use [Suitable for Tight Space] It is easy to use even in the tight space or confined areas. This bit holder provides convenience and efficiency whether you are working in a tight space or tackling a complex task [What You Get] The package includes 4pcs drill bit extensions and 4pcs PH2 bits (optional). It will meet your needs and upgrade your toolkit for a seamless drilling experience