The Samurai comes with 1LBS of penis stretching, strengthening, straightening weight built right into its single-rod. And adding more weight is as easy as popping on a weight plate or two. Amazingly versatile and easily expandable, this system is compatible with our super popular Colossus style weights. So if you already have a Colossus or a Stacking Pendulum, those same awesome weight plates will fit your Samurai and vice-versa.