Material: Aluminum Alloy & Plastic The red part is made of plastic Size: 11 x 3.7 x 8.6 inches (28 x 9.5 x 22 cm) Color: Red Package Includes: 1 x Drilling Locator (excluding electric drills and drill bit) Features: Easy to Drill The woodworking drill locator is designed to make wood drilling easier, straighter, and more accurate. Using a 1/4 inch hex shaft, it can be used with cordless and corded drills and impact drivers. Multi-Directional Use The fence can be connected to any square base on all four sides. In addition, the fence can be used in multiple directions and can also be aligned with the edge of the board. Built-in Hexagonal Drill Bit There are two pins in the center, which can be stored on the device when not in use. When in use, they are screwed into the bottom of the base and can be tightened with one of the column caps, which has a built-in hex bit. Maximum Size The drill bit capacity of this woodworking drill locator is 1 inch. If removed and turned upside down, it can accommodate a drill bit up to 2 inches wide. The V-shaped groove on the base allows for easy drilling into the center of round stock such as dowels. Complete Accessories Includes key chuck, conical depth control shaft, limit ring, spring return, reversible chuck bracket, built-in V-groove, centering feature, and adjustable fence. How to Drill: 1. Adjust the drilling height according to the thickness of the board. 2. Tighten the clamp to secure the drill guide onto the wooden board. 3. Insert the step drill bit into the pilot hole. 4. Turn on the electric drill and set the speed between 500-1500 RPM. 5. Drill slowly during the initial phase, especially before half of the step drill bit enters the wood, to improve accuracy.