Seitech trolleys are beautifully engineered and crafted. Perfectly balanced, light-weight designs with low-friction wheel bearings make moving and launching a breeze. Whether you are a child launching an Optimist, an athlete preparing your C420 or Laser for a regatta, or an older adult launching your kayak or aluminum boat, there is a design to fit your needs. Perfectly. Each one is carefully engineered down to the smallest detail to give you many years of smooth, trouble-free service.