Please note: There may be slight color difference or discrepancy in the actual product, which does not affect the use, please don't mind, thank you! Precise Alignment for Multiple Profiles: This aluminum profile drilling guide is suitable for 20 30 40 60 90 aluminum profiles , can be quickly aligned and locked in position , to accurate drilling position Stable Drilling Support: The drill guide provides stable support to avoid the drill bit from sliding or shifting , avoiding damage to the aluminum profile , and the strong light etched markings are clearly visible , quickly locating the desired drilling position and improving construction efficiency Enduring Material: The whole is made of high hardness aluminum alloy , sturdy structure , not easy to deform , the is anodized , erosion resistance , oxidation resistance , wear resistance , CNC machining , to the guiding accuracy Complete Drilling Kit Included: The kit contains 2pcs countersunk stepped drill bits (8mm , 10mm) , 2pcs 8mm drill caps and 2pcs 10mm drill caps , which can be used to drill standard countersunk holes in aluminum profiles directly , eliminating the need to choose your own drill bits It's DIY kits, needs to finish by yourself. Color: As Shown Material: Aluminum Alloy Package Contents: 1 * Complete Drilling Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.