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 M6M8 Aluminum Profile Drill Guide Set Kit is an essential tool for anyone working with aluminum profile, simplifying the hole drill process 【Adjustable Stop Feature】: Equipped with an adjustable stop function, this tool allows you to set it according to profile sizes like 20, 30, and 40 【Easy Installation and Security 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 security work 【Positioning for Additional Holes】: Remove the copper post, slide your product into the aluminum profile. Use a ruler to confirm positioning before locking it in place Specification: Body: Aluminum Alloy Screw: Brass Drill Sleeve: Stainless Steel Size Chart: 9.7cmx3.8cm/3.82inchx1.50inch Package Includes: 1 Drill Auxiliary Tool 3 Slide Bar Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.