Rox Apex Adapter block riser allows you to install Rox Pivoting Risers on 06 Yamaha Apex (short track) or Attack. When used with Rox 3 1/2" riser stock bars are positioned 1/2" higher than stock and can then be postioned further forward, back or anywhere in between. 2007 Models come stock with 1" higher block risers and 1" lower bars than the 2006 models. Therefore a 3 1/2" riser would actually lower your bars 1/2" and a 5" would place your bars 1" higher than stock on the 2007 Apex (short track) and Attack. Pivoting Risers sold separately.