DeWalt DWA2T40IR Impact Ready 40-Piece FlexTorq Screwdriver Set for $18.99. Shipping is free on orders over $49. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for reference. It features a 10x Magnetic Screw Lock System for strong fastener retention and the flextorq allows bits to flex up to 15°. Most places have it for about $28.