All woods have their own properties that make them suitable for different products. Only one specific variety of willow has the right weight and resilience to be made into cricket bats. Many woods are used to make musical instruments, but only a few trees produce wood that is suitable for xylophone keys: only certain high-density woods will create a satisfactory musical note when struck. Light-density woods, on the other hand, absorb sounds and can be used in rooms to reduce echoes. Wood is also a poor conductor of heat, so it is commonly used for handles of pots and pans.