The universal quick attach is currently the standard for quick attach skid steer attachments, and with good reason. Before adopting the universal quick attach, it was a long process to buy new attachments for your machinery, involving several measurements and more frustrations. Since the industry has adopted the universal quick attach as the standard for quick attach skid steer attachments, it has become very easy to purchase and change tractor and skid steer attachments. Even with the common use of the universal quick attach, there are still a few variations around which do require special mention as they are not compatible with the universal quick attach function (yet).
Bob-Tach: The original universal quick attach, this is where it all started, it laid out the frame work for today's quick attach skid steer attachments.
Pin-on mount: The old way of doing things, this method requires four pins to be properly located on the attachment, matching up with the frame laid out on the equipment, this ensured a good fit, but each machine had a different lay out making it impossible to freely interchange attachments.
Power Bob-Tach: Bobcat has now gone to a powered version of the Bob-Tach, which does not require getting off of the machine unless hydraulic lines need to be moved or connected.
John Deere Quick Attach: John Deere's version of the popular standard. This is not compatible with the universal quick attach, as John Deere owns this standard and does not share it with any other company.
Universal Quick Attach: This is currently the industry standard