TACO Grand Slam 390 Mount w/180° HandleGrand Slam 390 Mount with 180 Handle The heavy duty Grand Slam 390 Outrigger Mount steps up to the challenge for anglers craving a more competitive edge on the water. We took all the durable, dependable features of the popular GS 380. We incorporated a more robust gusset and thicker arm to withstand the torque and pressure created when using longer outrigger poles. This base is perfect for the bigger, faster center console boats between 25 and 40.