Simple and quick, Skip's Originals TOSI Strike Indicator can be added or removed from your leader without removing the fly. Simple twist on/twist off method requires just one turn to hold tight to a leader butt; 3 turns will secure the TOSI to the finest tippet. Will not damage your line; a tiny latex strip holds it in place without slipping. Can be easily adjusted up or down without removing the fly, or rigged as a slip float for long lining. Made of light foam with easy-to-see bi-color finish. Reusable. Simple and quick Add or remove without removing the fly Twist on/twist off 1 turn holds on a leader butt Use 3 turns to secure to light tippet Will not damage your line Easy to re-position without fly removal Can be rigged as a slip float for long lining Easy-to-see bi-color finish Reusable