Bosch 24 Piece Impact Tough Screwdriving Custom Case System Set for $9.99. Shipping is free on orders over $25. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for reference. With the xtended torsion zone, Bosch impact tough screwdriver bits have been upgraded to supposedly deliver 10x life over standard impact bits. Most places have it for about $19.