Poldo tackle
The poldo tackle<ref>The complete guide to knots and knot tying — Geoffrey Budworth — p.219 — Template:ISBN</ref> is a peculiar tension-applying and tension-releasing mechanism.<ref>ITS Tactical: Poldo Tackle Accessed: 4/29/2012</ref><ref>Poldo Tackle How-to Accessed: 5/8/2012</ref>