ACE's 21-piece Quick-Change Hex Shank Accessory Set is perfect for the DIY user and home use. The set includes eight 2-inch driver bits, two 3-1/2-inch driver bits, 4 non-magnetic nut setters, 1 heavy-duty bit holder, 4 titanium hex shank drill bits and 2 masonry hex shank drill bits. Driver bits are made from premium S2 steel. The non-magnetic nut setters are cold-forged Chrome Vanadium (CrV) steel. Titanium drill bits are made from high quality High Speed Steel with a titanium coating for longer tool life. The masonry drills are made with premium C2 micrograin carbide for excellent wear resistance. The set also features a heavy-duty bit holder that will securely hold all quick-change hex shank tools. The set is packed in a space-efficient tool case. *