in Quantity: you will receive 6 pieces of patio umbrella clamp with 24 pieces of stainless steel screw, enough quantity to meet your needs and replacements, which can help you mount umbrella to railings quickly and securely Reliable Material: the patio umbrella holder is made of iron material and the screws are made of stainless steel material, reliable and reusable, sturdy and strong, not easy to break, fade or rust, which can you for a long time and you can use them with confidence Easy to Install: the patio umbrella bracket is easy and convenient to install and remove, no tools required, simply turn the screws to adjust the hole diameter and to achieve the desired width, which can hold umbrella securely Wide Range of Applications: the deck umbrella mount is a practical and classical tool, suitable for railings, fences, poles, porches, balconies and so on, which can provide a comfortable and cool shade Size Information: the patio umbrella stand measures . 3.94 x 4.13 x 1.18 inches/ 10 x 10.5 x 3 cm, which can hold an umbrella shaft up to 1 3/4 inch thick, and the maximum width of the railing can't exceed 2 1/2 inches; Please confirm the size before placing an order Color: Black Material: steel Package Contents: 6 x Umbrella Clamp Mount 24 x screw Only the above package content, other products are not included. Note: Light reflection 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.