Product Description: 1. Compatibility: Works on Driveline Series 1610 to 1880 and almost all other heavy-duty truck and machine type u-joints with bolt-retained bearing cups ( Similar to OTC 5192 tool ) 2. Material: Made of heavy duty steel with high strength and toughness for durability and perfect match, and its black powder finish is good for rust resistant 3. Application: Install bearing cups on bolt-retained universal joints in a quick and simple way 4. A MUST-HAVE: This tool automatically aligns bearing cups during installation with no damage to the needle bearing. .