Hi Bryan thank you for showing a intrest the float i saw was about 9 inches long by 3 inches round there is a spring running down the middle how it is used is you fould the float in half and it locks your main line at a set depth say 60ft in 100ft of water when you get a take the float snaps staight and runs down your main line and stops at the swivel on your hook trace so you can bring your fish along side by the leader this saves having 30ft of 400LBS leader on the boats deck which could lead to you getting all tangled up round your legs the Shark im after can reach in 350LBs the biggest one so far caught was 250 Lbs and run like a steam train and can rip 200 yards of line off you in seconds the sharks are Porbeagle hope this helps ill see if my son will help me post pictures tightlines Alain
Alain, I think you are looking for the Aqua Gem Snap Floats. I do not know where to purchase them but if you google it you might find a supplier. Good luck.