The Powerblock Sports 9.0 Stage 3 add on kit is designed to expand a Stage 1 & 2 Sport 9.0 to 59kgs (130lbs) per hand & guarantees effective free weight training. This add on Stage to Sport 9.0 Stages I & II helps to gain more strength, tone the muscles & reshape the body. The Sport 9.0 with all 3 stages replaces 37 pairs of dumbbells or 2186kg (4819.3lbs) of free weights.