Feature: Great Compatibility — Works on Detroit Diesel DD15 & DD16 engines built before HDE0077481 & DD13 engines built before HDE0079072. Superior Quality — Advanced heavy duty steel process and black non-slip PVC coated handle, durability and anti-corrosion. Ultra-precise design meets the requirement of high precision and hardness and a much longer service life. Includes — W470589042300 4.6mm - 0.1811 in and W470589022300 4.1mm - 0.1614 in. Easier Work — Replace ATCPRO2300 W470589042300 and work in a easier way to save your time and money. .