Upgrade your DIY projects with this 12-piece set of black straight line inside connector joint brackets. Crafted from high-quality materials, these brackets measure 3.9 inches in length and are designed to seamlessly connect 20x20 series aluminum extrusion profiles with a slot of 6mm. The set includes 6 pieces of 2020 series brackets and M5 screws for secure installation. Whether you're building furniture, shelving units, or other structures, these connectors provide a sturdy and sleek solution for joining aluminum profiles at a 90-degree angle. With their silver finish, they blend seamlessly into any project aesthetic. Simplify your assembly process and achieve professional-looking results with this versatile connector set.