The Survival Tool has all your basic functions for outdoor preparedness.
This tool has 15 Functions: x2 rulers, twine knife, bottle opener, hang rope hole, cutting saw, outside hex wrench, large knife, smaller knife, Cleburne spanner, location hole, flat screwdriver (small), emergency rope. 
Dimensions: 3 3/8" x 2" (Size of Credit Card) Material: Matte black stainless steel.