Robuta

https://www.leevalley.com/en-gb/shop/tools/power-tool-accessories/router-bits/118414-misenheimer-carbide-upcut-spiral-bits

https://www.leevalley.com/en-gb/shop/tools/power-tool-accessories/router-bits/116284-leigh-high-speed-steel-spiral-upcut-bits-1-2-shank