22 by an axle rod 20 that passes through holes 18 defined by the support arm the support arm 14 rotates about the axle rod 20 mounted to the support arm 14 is a counterweight that is mounted to the upper portion of the support arm the stabilizer rod 34 is pictured in a retracted position as well one end of the stabilizer rod 34 is mounted to the retainer bracket 48 by a pin 54 that passes through a hole defined in the end of the stabilizer rod 56 the stabilizer rod 34 rotates about the pin 54 when the present invention is retracted the stabilizer rod 34 hangs by the pin 54 against the wall of the truck 12 at the other end of the stabilizer rod 34 is a u shaped bracket 44 mounted to the top of the support arms 14 is a bearing 58 the bearing 58 receives the end of the take up roller the bearing 58 comprises a loop that defines a bore through which passes the take up roller 28 and allows the roller to rotate freely on either side of the bearing is a washer 30 the washers 30 hold the take up roller 28 in place and prevent the take up roller from sliding out of the bearing 58 attached to the take up roller 28 is one side of the rectangular section of material 32 attached to the truck 12 is the opposite side of the rectangular section of material 32 the take up roller 28 is rotated to wrap the rectangular section of material 32 around the roller as the material 32 is rolled up the slack separating the opposite end and the roller 28 reduces causing the support.