Features: 1. Application: Fits for Cummins B series 5.9L diesel engines used in Dodge trucks. Also be useful in many other applications where these size fasteners are in a confined area 2. Superior Material: Made of standard No.1045 steel with high strength and toughness for durability and perfect match 3. Function: Designed to remove and install the 13mm injection pump mounting bolts and idle lock nuts 4. Nice Design: Non-slip rubber handle design, give you a comfortable feel and it does no harm to your hand .