All Bath Royale toilet seats come with bottom mount hardware in the package.
Top mount hardware is required for toilets with flat sides, "skirted" bowls or concealed trapways, without access to tighten wing nuts underneath (see photo below).
Top Mount Toggles make installation easier - Enables seat to be installed from the top, without getting on the bathroom floor or reaching underneath the toilet bowl.
Perfect for tight spaces and RV (recreational vehicle) toilets.
Holds seat firmly in place - Corrosion-resistant stainless steel screws and zinc nuts provide metal-to-metal strength and holding power.
NOTE: Use with mounting bases and other parts included with all Bath Royale toilet seats.
NOTE: For toilet bowls with industry standard mounting holes (round and 5/8 inch diameter).