Portable and sturdy design - A necessary fishing accessory for any angler, built to be easy to carry and durable for everyday use in tackle boxes, bags, or on a boat. Dual side spool buttons - Spool buttons on both sides enable convenient winding and unwinding of the fishing line, helping keep the line organized and reducing tangles. Backstop protection - The backstop protects the fishing line from damage during handling and storage, preserving line quality. Clear lid for quick checks - Features a clear hollowed out lid that allows you to check the contents quickly and easily without fully opening. Main spool winding tool performance - Designed to wind the main fishing line efficiently, supporting controlled tension and neat, reliable line organization. 2-3 practical use scenarios - On a boat or kayak, re-spooling or replacing worn main line to maintain optimal performance. - At the bank or shore, unwinding or winding line during setup for the next cast. - While traveling, storing pre-wound main line to prevent tangles and keep gear organized in a tackle bag or luggage.