Marine grade SS304 Rail mount Anchor brackets for horizontal rails High quality 304 premium-grade stainless steel Marine Grade Construction, electropolished for corrosion protection Anchors up to 35 lbs. are held from the rail. Secure Grip Anchor to any horizontal rail! Allow Quick release for emergencies. Easy install and to set in desire angles Dimension details: Rail: Horizontal Fits Round tube: 1inch~1-1/4inch (25.4mm~31.7mm) Fits Square tube: 7/8inch~1inch (22.2mm~25.4mm) Colour:Silver Material:stainless steel Size:123x114mm Package Contents: 1 * Marine grade SS304 Rail mount Anchor brackets for horizontal rails Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.