A rolling seat rather than a kneeling pad - the wheels move it down a row of beds without standing up, and the height sets between 16 and 20 in so knees and back stay out of the work. The seat swivels a full circle to reach either side without shifting the frame. Seven-inch tires cross soft soil and lawn instead of digging in. A heavy metal frame with a sprayed rustproof finish carries 330 lbs at 15 lbs of its own weight. It measures 18 x 12 in with an 18 x 13 in seat. Green, red or blue.