PROFESSIONAL FUNCTION: Designed to remove and install front crankshaft oil seals without damage both seals and crankshaft. APPLICATION: Fit for Detroit Diesel DD13 and DD15 Engines. Directly replace OEM part number W541589023300. Our tool exceed the OEM specification. PERFECT DESIGN: Used with Installing Ring Adapter W541589003400. The new installation ring installs the seal to the correct depth. PREMUIM MATERIAL: Crafted from heavy-duty steel with black coated for professional level reliability and durability, resistance to corrosion, providing a long-term service. PACKAGE: Front Crankshaft Oil Seal Remover and Installer Tool .