This Strongway Machinery Skate is great for moving heavy equipment and machinery. Made of steel with a powder-coat finish. The top of the skate has a rubber surface for extra grip. Wheels are set up to move in straight lines. Carrying handle makes it easy to move from job to job. The hook feature lets you hook multiple skates together to easily move larger objects. Rolls smoothly on 4 steel casters. Base L x W in. 8 x 7 1/4, Dimensions L x W x H in. 8 x 7 x 3, Hydraulic No, Includes Steel wheels, Load Capacity lbs. 3,300, Roller Size in. 2 1/2 x 5/8, Rollers qty. 4, Single, Pair, or Set Single. Great for moving heavy equipment and machinery Made of steel with a powder-coat finish Top of the skate has a rubber surface for extra grip Wheels are set up to move in straight lines Carrying handle makes it easy to move from job to job Hook feature lets you hook multiple skates together to easily move larger objects Rolls smoothly on 4 steel casters