10-499 This is Dubro's Tru-Spin Prop Balancer.  10-499   FEATURES Completely Adjustable Propeller BalancerPrecision-Machined Rotating Wheels to Assure Perfect Balance EasilyUnique Over/Under Set-Up Option Accomodates Even Large-Scale Props   INCLUDES One Tru Spin Prop Balancer   COMMENTS The following balancer shafts are available for...