Adjustable Clamp Cup Holder Threaded Knob Clamp-on Cup Holder Opening Frame Workspace Item for Boat Railing

This matte black metal clamp-on cup holder offers a simple, practical way to keep a drink close without taking up surface space. Its Opening-frame wire construction gives it a clean look while the round cradle and front support help the cup sit securely .Designed for desks, table edges, boat railings, yacht areas, and RV edges, it works well wherever firm edge mount is needed. The screw-tightened clamp base and threaded knob make it easy to fasten, and the adjustable mounting height from 0.31 to 2.8 inches helps it fit different edge thicknesses more comfortably.As a desk accessory or travel-friendly side drink holder, it is useful for keeping drinks in reach during work, relaxing onboard, or organizing a compact setup. With a 3.15-inch inside diameter and a shown opening of 2.8 inches, it provides a straightforward storage area for daily use while maintaining a tidy, uncluttered surface.