Socket for cleanout plugs with 1-1/8" x 1-1/8" square raised head. Can be used with the T-handle supplied in the kit (or sold separately) or a standard 3/4" socket wrench. 
 
Works great for the following size cleanouts:
- 1-1/2" PVC
- 2" brass
- 2-1/2" brass. 
 
May work with other sizes as well.
 
PN4