Item Type: Umbrella Holder Clip Material: Stainless Steel Color: Black, Silver Purpose: Universal installation deck umbrella frame is fixed on the railing. Package List 3 x Fixing Clips 6 x Fixing Sheets 12 x Screws 12 x Nuts Manual measurement, please allow 1& 8209;2cm error. 13 SETS CLAMPS: Includes 3 sets of patio umbrella clips for quick and secure attachment to most decks, railings or parasol stands for great stability. 2EASY TO INSTALL: The deck umbrella clips and screws are sturdy, easy to install and move, easy to adjust, and suitable for a wide range of applications. 3MULTIPLE USAGES: Adjustable deck clamp offer more versatility and are ideal for mounting flashlight, flagpole, umbrella and other outdoor decoration. 4STAINLESS STEEL: These clamps are made of excellent stainless steel material with high hardness, rust and corrosion resistance and long service life. 5GLOSSY SURFACE: These mount clamps have glossy appearance, no burrs and no gaps, and not easy to hurt your hands when installing, safe and reliable.