Siding Installation Tools, Siding Mounting Kit for Use with 5/16-Inch Fiber Cement Sidings, Lap Tools Gauge with Adjustable Reveals, Polycarbonate Body, 2 Pack

Works great. Always saw them but never bought them. Finally did. They work great. Great price.

Like I stated if it's just two people be sure to get 2 sets of these and two people can knock out some Hardy quick, real quick

Use light pressure when clamping these onto fiber cement board and don't leave them clamped for very long. I was clamping them down with a lot of force which was damaging the fiber cement board exterior surface. Only light clamping is needed, even when you're working with 8' board lengths.Don't leave the clamps attached to the board when you don't need to. I left some clamped for a few hours and when I took them off, it took off the fiber cement board exterior with them.Also periodically clean the rubber side of the clamps (where they touch the board) to remove the fiber cement board particles that can collect there. They can also damage your exterior.My only complaint about these tools is that the acorn nut likes to come off easily. I know they're meant to come off so you can change the board height (and you'll likely need to change the height when you get into tricky situations like below windows, below eaves, etc) but these like to fall off and then you can't find them. Not sure if Gecko Gauges are any better as I haven't used them.These are absolutely worth the price if you're attaching fiber cement board in a "lap siding" style.

The only way to hang Hardy boards. A must have tool.We used these for the first time and had no problems.

Seem to be well built. Can't wait to try them out .

Works great, like another set of hands, must have for even spacing without having to measure.

The idea is great but the function is far from good. I've done many house with hardie and I tried by myself to do some and it just don't function that great. When u lock it in place your literally pushing the top part away from the house. Not allowing the hardie to sit in place where it needs to be. Great idea just not great for work.

Great tool for siding