Hemley Tools carries: - Gorilla Mills - [2026 Gorilla MIll Catalog](https://gorilla-mill.dcatalog.com/v/2026-Gorilla-MIll-Catalog/?page=1) - Titan - [hemlytool.com/content/documents/Titan-2014-USA-Full-Catalog55OFF.pdf](https://www.hemlytool.com/content/documents/Titan-2014-USA-Full-Catalog55OFF.pdf) - YG1 < 2/3 flutes ideal for roughing \> 4 flutes good for finish Get bits for Aluminum -- either uncoated or ZRN.