These new lead sinkers have micro small rubber bands added to the crimping area of the sinker. With hardly any pressure crimping these sinkers to your line, they have tremendous holding to your line. To say the least these sinkers are awesome especially when you are using small diameter leader line. If you are a trout fisherman , these are a must. These will not fray your line like the sinkers without rubber bands on the crimping area.
They come in 4 sizes and rubber bands are black.