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 and fittings, clock parts, pipework, jewellery, decorative parts and musical instruments. Ball catch A ball catch is a mechanical locking device that is used to hold a door closed without the need for a traditional handle or lock. The ball catch works by using a small metal ball that is pushed by a spring inside the catch. When the ball is pushed into a notch, it holds the door closed. To open the door, simply press the ball to release it from the notch. Ball catches are commonly used on heavy interior doors, such as cupboard doors, loft doors, bathroom doors and garage doors. They are also used in furniture such as wardrobes and drawers. The advantages of the ball catch include its simplicity of use, ease of installation and low cost compared with other types of locking.