This Secure Pro Credit Card Lock Pick Set is a full-sized lock pick set hidden inside what appears to be a credit card. At 1/8" thick, it is only a little thicker than a normal credit card. The back slides off to reveal 4 different style lock picks and a double-sided tension tool. The picks are stamped of strong, solid metal and will give you hundreds of uses. This set fits perfectly in your wallet so that it's always ready to go when you are. As an added bonus, this set also includes a free book, "The Beginner's Guide to Lock Picking."