Out of all the couplers that I have used, I would consider the DROMONE ML:SMART to be the safest. In my role as site manager, my biggest concern is safety. With the ML:SMART’s smart pin sensing and visual confirmation features, my operators and site attendee’s are notified when they are working in safe and unsafe conditions. When the coupler changes from flashing red to solid green, it is locked onto the attachment and there is no chance of it falling off.