Brass Brass is a metal alloy composed mainly of copper and zinc. Corrosion resistance: brass has a high resistance to corrosion, making it useful in damp or corrosive environments. Good electrical and thermal conductivity: brass is a good conductor of electricity and heat, making it a useful material in electrical and thermal applications. Easy to machine: brass is a relatively soft material that is easy to work, making it easy to machine to produce complex parts. Fatigue resistance: brass has good fatigue resistance, which means it can withstand high loads without breaking. These properties make brass a useful material in many applications, such as the production of taps, clocks, pipes, jewellery, decorative parts and musical instruments. Knuckle Hinge A Roller Knot Hinge is mounted on the outside of the door and frame. It consists of two parts, each with a rolling knot that inserts into the other part, thus creating the pivot axis for the door. When the door is closed, the rolling knot is completely inserted into the other part of the hinge, making it more discreet and less likely to be caught or damaged. Below is the table of technical dimensions (according to size): A X B C d à˜ screw à˜ of milling 30 x 30 2,4 0,8 2 4 40 x 40 2,7 0,9 2,5 6 50 x 50 2,7 0,9 2,5 6 Dimensions in mm Difference between Rolled Node and Protruding Node Hinges Protruding Knuckle Hinges are often considered more aesthetically pleasing than Roller Knuckle Hinges, as they are virtually invisible once the door is closed. However, Roller Node Hinges can be stronger and more durable than Protruding Node Hinges due to their more robust construction. The choice between these two types of Hinge will therefore depend on the specific needs of each project.