Pony 9865 Board Boss Decking Tool for Installation The Pony Board Boss pulls deck boards into shape and simplifies deck installation! Pulls bowed and/or warped boards into position before screwing them down. Use with the Pony #50 pipe clamp fixture for  pipe. Pipe clamp provides 2.5 screw length for infinite adjustment. Can be used anywhere along deck board, you are not limited to pulling only from the joists. Significantly less expensive and advantageous to similar products in market.