Feature: 1. [Sturdy Construction] The aluminum profile drill guide is made of aluminum alloy and brass, with precise processing and anodizing treatment, ensuring durability. 2. [Wide Compatibility] The aluminum profile punch locator is compatible with various aluminum profiles, including 20mm, 30mm, 40mm sizes, suitable for various installation scenarios. 3. [Enhanced Aesthetics] Designed for countersunk screws, making the installation smoother and more beautiful, enhancing the functionality and appearance of your work. 4. [Easy to Use] Remove the copper column, slide the product into the aluminum profile, punch the hole at the center 25mm from the top of the punch locator. Before locking the hole, use a ruler to confirm the position. 5. [M8 M6 Drill Bits] Equipped with M8 and M6 stepped drill bits, the aluminum profile punching auxiliary tool meets different drilling needs. Specification: Item Type: Aluminum Profile Drill Guide Material: Aluminum Alloy Punch Guide Size: Approx. 100x39mm / 3.94x1.54in Drill Sleeve Size: Approx. 14mm / 0.55in, 10mm / 0.39in Step Drill Bit Size: Approx. 8.5mm / 0.33in, 6.5mm / 0.26in Step Drill Bit Length: Approx. 90mm / 3.54in Step Drill Bit Shank Diameter: Approx. 10mm / 0.39in. Package List: 1 x Aluminum Profile Drill Guide 1 x M8 Step Drill Bit 1 x M6 Step Drill Bit 1 x 10mm Drill Sleeve 2 x Limit Ring Wrench