This design allows you to quickly transform it into three designs. You can take the seat off and adjust the knee pads toward the rear, which will enable you to work easily on jobs that require being on your hands and knees for long periods of time. Take the chest support off the Master Rac and you will have a version of the Racatac with your knees only 3/4” off the floor. 

 

Weighs 13-1/2 lbs, max capacity 300 lbs