I'm not sure who came up with the idea but it's pretty great.
Otera came up with it "one nut, one pole" and Joel perfected it: http://leagueofbikepolo.com/forum/gear/mallets/2010/03/08/attaching-the-mallet-head-to-the-pole#comment-70545
Make sure the teeth are large/sharp, I've been converted from the dowel method... this is better so far (lighter, just as easy to do, holding well, etc).
@JonoMarshall started
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Otera came up with it "one nut, one pole" and Joel perfected it: http://leagueofbikepolo.com/forum/gear/mallets/2010/03/08/attaching-the-mallet-head-to-the-pole#comment-70545
Make sure the teeth are large/sharp, I've been converted from the dowel method... this is better so far (lighter, just as easy to do, holding well, etc).