Craftsman 233 pc. Field Technicians Mechanics Tool Set 34233 The Craftsman 233-pc field technician's mechanics tool set is made of fine alloy steel It features both standard and metric units 9 extensions; 26 hex keys; 12 nut drivers; 10 pliers; 3 quick-release ratchets; 10 screwdrivers There are also 39 wrenches, open-end and full-polish deep-offset in standard and metric Steel construction ensure solid performance