This tool attatchs a ratchet wrench to a wrench , pry bar or anything that will fit in it .Then you can put a long tube at the end of the ratchet to get allot more leverage to loosen or tighten anything. This tool is supper strong and comes in two sizes and fits wrench from 5/8 -- 15/16 and attachs to a 1/2 inch ratchet wrench and cost $ 30.00 dollars and  the second tool fits wrenchs from  15/16 -- 1-3/8 wrench and attachs to a 3/4 ratchet wrench and cost $ 40.00 dollars.