The attachment of the grinding machine is satisfactory, 2 sets of bolts are provided, Much play in the pivot axis, which adversely affect the cut. The metal tray is very thin and not rigid enough given the weight of the whole, having fixed on a wooden plate, is better. The locking system is a gadget and totally ineffective. In summary, low-end hardware, but for 30 ..... !! The price rose from 34.96 to 49.94 in 15 days .... .... ?? 39% .. ?? (The quality should be much higher)