Made of plastic material, durable, rustproof and long service life. It is able to hold your paddle firmly so that it does not away. Great for any inflatable watercraft, including kayaks and small boat where drilling holes is not an option. Super strong and simple low-profile design. Features - Color: Black. - Size: 7.5 x 4.5 x 3.2cm. - Material: Plastic. - Diameter: Phi;32. - Made of plastic material, durable and high quality, long service life. - Screw fix, make you fix it more easily and tightly. - Easy to hold your paddle firmly so that it does not away. Perfectly fit for outdoor activity use. - Great for any inflatable watercraft, including kayaks and sup's where drilling holes is not an option. - Super strong and simple low-profile design. - Caution: No Screw Included. - Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you