Specifications Material: Aluminum Alloy & Plastic The Black part is made of plastic Size: 11* 3.7*8.6inch (28*9.5*22cm) Color: Black Package Includes: 1 X Drilling Locator (Excluding Electric Drills and Drill Bit) Features Easy to DrillThe 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 UseThe fence can be connected to any square base of this 4 sides. In addition, the fence can be used in multiple directions. It can also be used as the edge of the board. Built-in Hexagonal Drill BitThere are two pins in the center, which can be stored on the ship 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 SizeThe drill bit capacity of our woodworking drill bit locator is 1 inch, but if you remove it and turn it upside down, you can install a drill bit up to 2 inches wide. The V-shaped groove on the base can be easily drilled into the center of logs such as round pins. Complete Accessories The package have key chuck, conical depth control shaft and limit ring, spring return, reversible chuck bracket, built-in V-groove, centering and adjustable fence. How to Drill: 1. Adjust the drilling height according to the thickness of the board. 2. Tighten the clamp to fix the drill guide on the wooden board. 3. Place the step drill bit into the pilot hole. 4. Turn on the electric drill and set it to a certain speed of 500-1500rpm. 5. Before drilling half of the step drill bit into the wood, drill slowly to improve accuracy.