Strong aluminum frame weighs only 8-1/2 lbs. and enables you to move, spin and shift your leverage to different positions. -Adjustable seat allows you to roll to move instead of crawling and bouncing on your knees. -Features 3 in. Polyurethane casters and tool tray. -Thick foam kneepads. Product Type: -Creepers & Seating. Dimensions: Overall Height - Top to Bottom: -16.5 Inches. Overall Width - Side to Side: -19.5 Inches. Overall Depth - Front to Back: -20 Inches. Overall Product Weight: -10 Pounds.