Handheld grinders and files will help you not only with jewellery made from crystal resin. Special grinders and files offer sets that will help you sand and treat surfaces, such as wood, plastic and soft metals. Handheld grinders are compact, they contain a Li-ion battery that lasts long and runs down slowly and you can pack it in a bag when you’re travelling. You can even easily charge an aku direct grinder using a USB cable. In this category you’ll find grinders as well as replaceable discs and files that are compatible with them.