This product is a PVA bag stem that allows anglers to tie up solid PVA bags in advance and quickly attach them to their mainline. The stem can be attached loop to loop style to the mainline, making it easy to change rigs quickly using the Flexi Kwik Change Swivel. The swivel also allows for more movement and keeps the lead positioned at the bottom of the bag without it splitting. The product comes with a Micro Sleeve to slide over the loop attachment for protection, and is compatible with all Fox leads.