Simply wrap your braid around the small puller and your mono line around the large puller. Then tension your knot with a slow pull.
They are also great when you snag a lure and need to bust off your line, rather than bending a bail arm on your reel while trying to break the line.
NOTE: Tasline Knot Pullers are fitted with a technical heat shrink from Techflex Australia. This material is superior, however it does not shrink straight, so an angled gap is normal.
Made in Australia