Brocraft Crappie Rod Holder For Pontoon Boat/ Pontoon Boat Rod Holder System/ Square Rail Mount Rod Holder System, Holds up to 4 rods per unit while slow trolling for crappie ,Rail mount fits the following diameters: 1" Rail tube and 1-1/4" square tube ,Easily accommodates 4 rod heads with its 24" tracker crossbar, 8" extension hight ,Four rod holder Full adjustability for rod angle ,Kit includes Side/deck mount, adjustable 360 angle