Tailor Made For: & Tunda Bed Rails System, compatible with 3/8 inch -16 bolt attach for D ring V ring Tie down Motorcycle Bike Rack Mount On Pickup Truck Deck.ANTI-CORROSION: This durable bed rail cleats is made of steel that is galvanized with silver zinc to prevent corrosion and rust American-Standard: Base size 1-1/4 inch long x 7/8 inch wide x 5/16 inch high. Protrusion size: 1-1/4 inch long x 9/16 inch wide (table slot) x 5/16 inch high. height 5/8 inch Unlike others, t-slot nuts are with cost effective , which tapped all the way through allowing for the bolt to pass all the way through Colour:Silver :metal Package Contents: 4 x T Slot Nuts 4 x Screw Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.