Description: Premium Material: The Drill Guide Tool is made from sturdy aluminum alloy, ensuring durability and performance, designed for long term use Aluminum Profile Punching Auxiliary Tool: The Aluminum Profile Drill Guide Set Kit is an essential tool for anyone working with aluminum profile, simplifying the hole drill processAdjustable Stop Feature: Equipped with an adjustable stop function, this tool allows you to set it according to profile sizes like 3030 and 2020; Simply adjust the stop post to point at "30" for accurate alignmentEasy Installation and Safe Work: Choose the appropriate slider based on your profile specifications, slide it into the aluminum profile, and secure it onto the copper post. Lock the brass screw and use a step drill for safe workPositioning for Additional Holes: Remove the copper post, slide your product into the aluminum profile, and drill at a center point 25mm from the top of the drill guide. Use a ruler to confirm positioning before locking it in place Size Chart: 11cmx2.9cmx3.8cm/4.33inchx1.14inchx1.50inch Package Includes: 1 Piece Drill Auxiliary Tool (Including 3030 Slide Bar), 1 Piece 2020 Slide Bar, 1 Piece M6 Bit, 1 Wrench Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.