Schaefer Mid-Rail Chock and Cleat Mounts on 1 x 1/8-Inch T-Track fits Up to 1/2-Inch/13mm Line 316 Stainless Steel 6.5 Inch long (165 mm) Fits up to 1/2 inch line Mounts on 1 x 1/8 inch T-Track (Schaefer product #74-35 or 74-35G) Safe Working Load 2500lbs (1140kg)