[Application]Compatible with FOR Alpha One Gen 2 MR Mercury 2.0L 2.4L 2.5L without preloaded pin All Mercury 3.0L. for use on retainer part number 8245191, 824519 1, 11-42632, 824519 and 853651. [High Performance]Specially designed to easily and properly remove and install the threaded bearing retainer nut under the water pump housing for Sterndrives Mercury Mariner outboard gearcases. [Direct Replacement]Replaces for 91-43506T 91-43506; Replaces for 18-9842; Replaces for 90240. Comparable to part number both in quality and functions. [Superior Material]Made of top quality Metal for great strength, meet or exceed part number quality standard, impact resistance, sturdy and . High precision and hardness long-term reliable service. FOR Mercury Alpha One Gen 2 Sterndrive Outboard compatible Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due to Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:Black Material:Metal Package Contents: 1 x Bearing Retainer Wrench Spanner tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.