Slide a Diamond Swivel Sleeve on your leader and crimp it anywhere you want to put a dropper. Black Anodized
  Diamond Mini Copper Double Sleeves   Sleeve Size (mm) For Monofilament Diameters (mm) Momoi Hi-Catch Mono Lb Test Coated
Diamond Fishing Products Mini & Silver Lock Sleeves represent the ultimate combination of quality metals, advanced machining and precision cutting.