Fits standard 6 inch drain cleaning plug. It also has a seal to keep critters and roots out. It has a lower profile than square plugs. Above. To tighten it (and presumably take it off someday), take a 2x4 and drill a hole along the long axis. Covers with a proud square for lawn mowers, I agree.
🧼 Efficient Cleaning with Canplas 193064 Flush Cleanout - 4 Inch Diameter
9 Review
High-Quality White Plastic Flush Type Plugs for Industrial Hardware Applications
9 Review
🔌 Enhance your Woodworking Projects with KREG P PIN Solid Wood Pocket Hole Plugs
8 Review
🔌 Kreg P OAK Plugs Pocket Hole 50 Pack
7 Review