These spiral 'O' flute router bits are ideal for industrial applications and are manufactured to produce optimum results on every cut, and should help make aluminium projects less labor-intensive. Made from the highest quality sub-micrograin carbide, they feature a polished "mirror finish" cutting edge. This means a cleaner cut, reduced risk of chip re-welding, superior surface finish, and extended tool life. Right hand helix right hand cut. These router bits can be used to cut the following materials: ALPOLIC® Copper Composite Material (CCM) Alucobond® Aluminum Aluminum 5052 Aluminum 6061 Aluminum Alloys Aluminum Composite Materials (ACM) Aluminum Composite Panel (ACP) Alupanel® Brass Copper Dibond® Durabond e-panel™ Etalbond® Fomex® with Aluminum Face Gold Non-Ferrous Metals Plastic Silver Solid Surface Titanium Composite Material (TCM) Wood Suitable for use with CNC Routers and shouldn't be used with a handheld router. Do not cut ferrous metals with these bits. It's recommended to use mist lubricant system or air cooling for best results and extended tool life.-bg