Connect the Main Frame 2 to the Upper Support Frame 1 using one Hexagonal Bolt 13, Nylock Nut 15 and Washer 19, the insert the Safety Pin 17, Attach the Cross Bar 14 Using one Locking Knob 18. Moisten the inside of the Foam Grip 10 & Circular Foam Grip 11 with household furniture polish (liquid) spray and slides onto both ends of the tube.