Set of 5 mini circular saw discs blades for use in hobby mini drills for small cut off jobs. * High speed steel blade and mandrel set is ideal for fine precision cuts in aluminium, brass, copper, wood and plastic. * High speed steel blade and mandrel set is ideal for fine precision cuts in aluminium, brass, copper, wood and plastic. *. Made from strong HSS high-speed-steel for durability. * High Speed Steel blades set for accurate,fast and precision cutting. * Maximum RPM: 20,000. * Suitable for timber,plastic,fiberglass,copper,aluminium & thin sheet metal etc. * Package includes: 2 x madrel and 5 x HSS disc blades. * CUTTING SHEET MAINTENANCE:The cutting piece at least six months to a year before grinding, the operation is also very simple, the whole process of grinding can be completed in 2 minutes. * Note: Do not cut too hard material, it is best for cutting wood and PVC.They vibrate and must be handled carefully to prevent them from jumping when cutting.