PlumbMaster Approved 56544 Dual Socket Wrench for Toilet Installation, 9/16" x 1/2"
How to install commercial toilet seats
WMAZtool Tub Drain Remover Wrench - Use to Install and Remove Most Bath and Shower Drains and Closet Spuds Square Plastic Toilet Seat Nuts - - Amazon.com
Kobalt 2-in-1 Plumbers Wrench in the Plumbing Wrenches & Specialty Tools department at Lowes.com
Bibb Seat Wrench - Plumbing Parts by Danco
JTWKING Tub Drain Remover & Basin Wrench, Dual Ended Ratchet Wrench Use to Install and Remove Most Bath and Shower Drains and Closet Spuds Square Plastic Toilet Seat Nuts - - Amazon.com