The 4-Pack Flip Socket Replacement Shafts Come In A Variety Of Sizes and Are Compatible With Klein'S Flip Sockets (Sockets Not Included). Shafts Quickly Attach to An Impact Driver or Our 1/4-Inch Quick-Connect Handles Driver and Handles Sold Separately. Each Piece Is Impact Rated, Making It An Essential Tool For The Toughest Driving Applications.