Mid-Rail Chock/Cleat Stainless SteelSchaefer T-Track Chock cleats will fit Schaefer T-Track measuring 1" wide, 3/8" overall height, 1/8" "T" thickness and a base width of 1/2". They will not fit earlier versions of T-Track or some competitors models. Specifications:Length 6-1/2" (165 mm)ID 1-7/16" (180 mm)Line Size 1/2" (13 mm)Track 1" x 1/8" (25 mm x 3 mm)Pin. Size 1/4" (6 mm)SWL 2500 lbs. (1140 kg)Weight .9 lb. (.41 kg).