The RAP-405U is a leash plug adapter that adds a RAM C Size 1.5" ball connection to compatible stand-up paddleboards, surfboards, and other boards equipped with a suitable leash plug. Its twist-lock design allows the adapter to be secured directly to RAM rugged leash plugs and many larger leash plugs without drilling into the board. Constructed from high-strength composite with stainless steel components, this standalone adapter is designed for regular use in marine and saltwater environments. Key Features RAM C Size 1.5" ball Twist-lock attachment for compatible board leash plugs Installs without drilling into the board High-strength composite construction Stainless steel components for marine applications Supports up to 4 lbs under standard-use conditions Use Cases & Compatibility Designed for creating a modular mounting point on compatible stand-up paddleboards, surfboards, and similar watercraft with a suitable leash plug. This standalone adapter is compatible with a variety of RAM C Size 1.5" socket arms and mounting components, including compatible fishing rod and tube holders. Specifications Ball Size: C Size 1.5" Ball Material: High-strength composite with stainless steel components Weight Capacity: Standard Use: 4 lbs; Heavy-Duty Use: 3 lbs Product Weight: 0.2 lb What’s Included Assembly hardware Brand & Warranty Brand: RAM Mounts Manufacturer Part Number: RAP-405U Warranty: Manufacturer’s lifetime warranty. Gadget Mounts is an Authorized RAM Mounts Dealer.