Synceduo Boat Rail Cup Holder with Phone Mount — 2-Pack Clamp-On, 360° Swivel, Fits 5/8"–1.5" Rails

Synceduo's clamp-on boat rail cup holder with integrated phone cradle secures drinks and devices to rails from 5/8" to 1.5", swiveling 360° for easy access and spill reduction.

Built for small boats, pontoons, kayaks and PWCs, this two-pack combines a cup holder and phone mount in one compact accessory so you can keep a beverage and device within reach without drilling or tools. The clamp fits round or square rails, locks firmly in place, and the removable insert adapts to cans, bottles and most smartphones. Its weather-resistant construction tolerates sun and spray so your drink stays upright and your phone stays visible while you drive, paddle, or fish.

How does the clamp attach to different boat rails?

The clamp uses a no-tools thumbscrew and rubber-lined jaws to grip 5/8" to 1.5" round or square rails securely. It prevents rotation and abrasion by distributing pressure evenly and protecting metal or painted surfaces.

• Fits standard Bimini, pontoon, kayak and grab rails 5/8"–1.5"
• Rubber padding avoids scratching and improves hold
• Thumbscrew tightens quickly for tool-free install
• Works on vertical, horizontal or angled tubing with stable clamping

Will it keep my drink and phone steady on choppy water?

The cup holder's molded shape and snug insert cradle 12oz cans, 40oz bottles and most drink sizes to limit tipping. The integrated phone slot holds devices upright and accessible while dampening vibration.

• Molded cup pocket reduces lateral movement and spills
• Phone pocket supports most smartphones in portrait orientation
• Stable base design minimizes bounce on wakes and wakesurfing conditions
• Durable plastic resists water and sun exposure for long-term use

How does the 360° swivel help on different boats and seating positions?

The swivel joint rotates the cup-and-phone assembly so you can position items toward the driver, passenger, or aft seating without repositioning the clamp. Lock the swivel once you find the ideal viewing and reach angle.

• Full 360° rotation for ultimate placement flexibility
• Locking mechanism secures angle to prevent drift while underway
• Useful for multi-seat layouts on pontoons and center-console boats
• Accommodates slanted or offset rails for ergonomic reach

What sizes and devices does it accept, and is installation easy?

The holder accepts popular beverage sizes and most phones without extra adapters. Installation is a quick clamp-on action—no drilling, wiring, or permanent modification required—making it simple to move between boats or to store ashore.

• Designed for 12oz cans, 40oz bottles, tumblers with inserts removed
• Phone pocket fits most modern smartphones; remove insert for larger bottles
• Quick-change clamp allows fast transfer between vessels
• Includes two holders so you can outfit both sides of a cockpit

Who is this for: The Synceduo Boat Rail Cup Holder with Phone Holder is aimed at recreational boaters, anglers and watersports enthusiasts who want a no-fuss way to keep a drink and phone handy without altering their boat. It's ideal for pontoon families, kayak anglers who need a secure spot for gear, jet-ski riders wanting quick access to a phone, and anyone who prefers tool-free, removable accessories for shared or rental craft.