The ATI Tach-All conversion plate is the original conversion system for tractor front-end loaders. The QA-JD3 model of Tach-All is built specifically for John Deere QA loader models 510, 512, 520, 521, 522, 540, 541 and 542 so each pin hook and pin in the Tach-All matches up perfectly with the factory original, which means no compromises! Your loader will function just like the original manufacturer had intended, but better. The compact design keeps attachments close to the loader arms, meaning you sacrifice very little breakout force. ATI’s tough construction assures years of use, and the heavy-gauge steel attachment brackets and precisely made pin hooks give factory-grade fit and trouble-free operation. Using the Tach-All Quick Attach system also allows you to rent readily available skid steer attachments to use with a compact tractor, so you can increase your productivity and reduce your equipment costs while making your job easier.