For Adjusting Idle Mixture Screws on GM and Chrysler. Heavy-duty flexible shaft for easy access. Four adapters conveniently store in the hollow handle.Set IncludesCarburetor adjusting tool Double D adapter for Gm s79 thru present 14 in. hex adapter for pre 78 GM 332 in. hex adapter for s78 thru present Chrysler 1.7-2.2L engines 4.5 mm hex adapter for 78 and 79 GM. Item Weight - 0.310 lbs