Hey, so this Whitecap T-handle latch is exactly what you need if you're looking to add some security to your cabinets, lockers, or doors. It's got this solid T-handle design with a built-in keyed lock that actually works smoothly - no janky mechanisms here. The outside diameter is 3 inches, and it needs a 2-1/2 inch cut-out for installation, which is pretty standard for most applications. It works with surface depths from 1/8 inch all the way up to 3/4 inch, so it's versatile for different door thicknesses. The shaft is 3/8 inch with metric threads, which is nice because it means it'll fit properly without stripping. Whitecap has been around since 1972, so they know their stuff when it comes to hardware - this isn't some cheap knockoff that'll break in a month. The white finish looks clean and professional, whether you're using it in a workshop, garage, or commercial setting. Installation is straightforward if you're handy with basic tools, and once it's in place, it feels really secure. The keyed lock gives you actual security rather than just a basic latch, which is perfect if you need to keep tools, chemicals, or valuables locked up. Seriously, if you're tired of flimsy latches that don't actually secure anything properly, this Whitecap T-handle is totally worth the upgrade. It's one of those simple hardware pieces that just works exactly like it should without any fuss.