Books about CAD:FreeCAD For Inventors*: https://amzn.to/43gDFDQFaszination 3D Druck(German): https://amzn.to/459EQrhFreeCAD: 3D-Modellierung(German): https://amzn.to/4kmXOzi
M6 stands for a diameter of 6mm (3mm radius), 35 stands for the distance of 35mm between the two inner bolts and 65 stands for a height of 65mm.If you have any wishes or questions , feel free to ask me.