To all my sprint and midget friends, this 3/4 jam nut wrench is designed to help prevent rounded off jam nut .The jaw picks up the nut on 4 sides unlike any wrench in your tool box. no more egg shaped nuts that wrenches in your tool box wont fit.3/8'' thick 6''long made from t-6 aluminum. made in the usa. Ive sold over 100 of these,now available on racingjunk.com or direct. dealers welcome,quantity discounts these wrenches are in the tool boxes of most mustseeracing.com sprint car crew chiefs Les Bales 219 776 2281 Crown Point ,Indiana