Description: 【Versatile Aluminum Profile Punching Aid】: Drill guide is an essential tool for anyone working with aluminum profile, making the process of punching holes easier. 【Adjustable Limit】: The punch locator aid comes with an adjustable limit feature that can be set according to the profile size such as 3030, 2020, etc. Simply adjust the limit column to "30" pointing hole as shown in the diagram. 【Easy Installation and Secure Punching】: Choose a suitable slider according to your profile specification, slide it into the aluminum profile, and tighten it against the copper column. Lock the brass screw and use a step drill for punching. 【 Positioning for Additional Holes】: Remove the copper column, slide your product into the aluminum profile, and punch at the center which is 25mm from the top of the punch locator drill guide. Use a ruler to confirm position before locking it down for punching. 【Material】: Made from aluminum alloy, this punch locator drill guide tool is lightweight, sturdy, and resistant to long time use. Specification: Material: Aluminum Alloy Color: Multicolor Size Chart: 11cmx2.9cmx3.8cm/4.33inchx1.14inchx1.50inch Package Includes: 1 Drill Guide includes 3030 Slider 1 2020 Slider 1 M6 Drill 1 Wrench Note: Please allow slightly errors due to manual measurement and different monitors.