Wivco TH12000 THE TWO HOLER(TM) Body and Fender Dent Puller Kit.
The Two Holer gets its name from the fact that the user makes two holes in the uni-body sheet metal from the front. Insert the Z shaped bar into one hole. Insert the pulling hook, which grasps the bar at the center of its length, into the second hole. The pull is then made by hydraulic power in which the user has total command over the sheet metal panel.
Although this sounds like a simple tool, a look at the kit shows the care and planning that has gone into it. The hooks and Z bars come in three diameters: high tensile alloy tool steel sized for 2,000, 6,000, and 13,000 pounds of pulling force. To prevent breakage by excessive mechanical force, the tool kit includes a slip coupling with a shear pin in it. This is used with the two smaller hooks and the shear pin will break before the strength of the hook is exceeded. Spare shear pins are included in the kit.