The file 'Slim 8mm Shaft Flush/end Mount For V-slot Extrusion 3D Printer Model' is (scad,stl) file type, size is 10.6KB.
This is an end-mount clamp for attaching 8mm linear shaft to 2020 v-slot extrusion. Use two M3x10mm screws and your favorite t-nut for mounting. Clamp uses one M2x12mm with M2 nut.