FIRMLY INSTALLEDThe inset spring for keep the spool in tight when you adding line one your reels.What such a small product can bring you is beyond your imagination. It is really desirable! MULTI-PURPOSEThe four holes on the winder are used for fishing rod, respectively suitable for 0.8/0.5/ 0.4/ 0.3inch of the fishing rod.Easy to install and disassemble anywhere and anytime as you want. ANTI RUST AND DURABLEThis fishing winder is made of qualified plastic, lightweight and small in size.Anti rust and will not out of shape. CONVIENT TO CARRYSmall size for easy storage ,will not burden you, convenient and practical.Designed to help anglers catch more fish, great accessories for fishing lovers. EASY TO SPOOLINGRotate the nut to adjust the spring tightness for keep the spool in tight when you adding line one your reels,handy for spooling. The adjustable screw can be extended to 68mm, able to hold 500 yard fishing line.