Diamond Fishing Products Diamond Swivel Sleeve - Slide a Diamond Swivel Sleeve on your leader and crimp it anywhere you want to put a dropper. #2 Crane Swivel with1.8mm Sleeve – fits 250lb Test (1.6mm) Mono 1/0 Crane Swivel with2.0mm Sleeve – fits 300lb Test (1.8mm) mono 2/0 Crane Swivel with2.3mm Sleeve – fits 400lb Test (2.0mm) mono 3/0 Crane Swivel with3.2mm Sleeve – fits 700lb Test (3.0mm) mono Packed 10 Sleeves per box.