Bullet_point: ['6-1/2" X 1/4" Top Plate with 2-7/16" X 4-15/16" Mounting hole spacing for 1/2" hardware', '670 pound capacity', 'All swivel sections are equipped with a lubrication fitting for field maintenance; RWM lubricates all swivel sections prior to shipment', 'Cold formed top plate, yoke and button are all heat treated to prevent brinelling, improve swivel action and increase service life', 'Top plate and legs are 1/4" steel, legs formed for increased strength and continuously welded to yoke'] (Page 1)