The Universal Sink Drain Wrench by Husky.  This versatile wrench fits hex nuts, as well as 4-tab, 6-tab, and 8-tab locking nuts on strainer drains. The square end is designed for tightening stand-up shower drains, while the wrench also fits into the internal locknut slots of all major manufacturer's plastic and brass drains. Additionally, its cushion grip handle provides comfort and control during use.  In like-new condition.