Greenlee 870 Screw Anchor Expander For Caulking Anchor Size 3/8" - 16

worked as expected

As a Steamfitter, I would see the electricians on the jobsite use these and they were kind enough to let me try it out. WOW!, If you have ever used the Greenlee 84305(the set tool that comes with a box of anchors) you know that sometimes you can't seem to get the anchors to "set" perfect every time, and it is IMPOSSIBLE to use in a hollow wall. With this, you drill your hole, screw(not just loosely place) your anchor right on this baby, set it in the hole and hit it with a hammer a few good times and the anchor is set perfectly square to the hole and FLUSH. Amazing when using it on cinder block walls, Just be sure you drill a nice clean hole and not blow through making it too fragile. I bought the 3/8" because I can get scrap pieces of rod easy, but I will probably get the #10 next. It will outlast me.

Works very well for setting anchors in a block wall and concrete floors, if you have ever had an issue setting a secure anchor in a block wall this is a must have item for the tool box!

You pay a premium for Greenlee, but you get what you pay for. I'm in the electrical services business. In this business there are a lot of times that you use a tool where its common knowledge that it has to be a Greenlee.

If you use hollow wall lead anchors. These are what you need to set it very right. You don't need to worry about drilling your hole too deep. These will set the anchor flush.