I'm liking these! 

*you may have to pinch the barb for these to fit*

convert any nymph into a jig
or give your leech/streamer all kinds of action.....
*my new go to for balanced leeches.... 
lots of mass ... sink faster than conventional tungsten beads 

size chart/guide
3/32" for hook sizes 18-16 (and some 14's)
7/64" for hook sizes 16-14 (and some 12's)
1/8" for hook sizes 14-12 (and some 10s)
5/32" for hook sizes 12-8 

*you may have to pinch the barb, for these to fit*

i always combine shipping costs