The triangle key included in this music box DIY accessory set is a tool that can be used to wind various types of clockwork mechanisms. Its construction ensures performance, making it a reliable choice for anyone who needs to maintain or repair their music boxes. This tool is an essential addition to any music box enthusiast's toolkit. Features -Color:Silver -Material:Metal -Size: 2.70X2.00X0.50cm/1.06X0.79X0.20in -Ideal for diy projects: these music box accessories are suitable for diy projects, allowing you to create your own music box -Easy to transport: the compact and lightweight design makes these accessories easy to carry and use on the go - design: the winding mechanism is designed to be efficient and requires minimal effort, making it easy to wind your music box - material: made from metal, these accessories are built to withstand regular use and provide performance -Wide compatibility: these accessories are suitable for a wide range of music boxes, making them a addition to your toolkit Package list: 3 x Music Box Winding Key