3/8x4" 10Pcs Inch Standard Fasteners for Heavy-Duty Zinc Wedge Anchors for Cement and Concrete

Drilled a 1/2” hole, drove anchor in, and tightened. Work very well, secure, and easy installation. Seems to be quality anchors at a budget price. Would definitely buy them again.

Nice working product

Good value. Worked perfectly. Fit in a 1/2” hole and snugged up nicely.

Perfect for our project.

I was impressed with how well these worked for my basement finishing project. I needed something to attach the treated 2x4 bottom plate to my concrete slab. Tapcons never work correctly, and I didn't want to invest in a powder-actuated nailer for the rare cases I need to attach to concrete. These were almost as easy as a ramset: I just stood on the positioned 2x4 (construction adhesive already applied to underside), drilled through the wood into the concrete with my hammer drill, nailed this through the hole and tightened the nut.I was able to tighten the nut to the point that it and the washer started to sink though the 2x4 and glue squished out from under the board. It held so tight to the concrete that I probably could've tightened it until it split though the board and/or stripped out the threads, so it was more than sufficient for hold down.This was in an older (cheap) slab, with areas where it was probably 2-3" thick at best. I was afraid the fastener would need to bottom-out to latch properly, but I had zero issues with hole depth or anything. I even got lazy and wouldn't clear out all of the drill dust, and these still held like magic. I'm ordering more now that I know they work for my use, and they'll be my go-to for concrete/brick anchoring in the future.

Very good quality for the price. Did an excellent job of anchoring our corn crib (will be used as a chicken coop) to our brand new concrete pad.

Stronger than other 5/16 anchors I have used. Good product. Holds tightly.

The big box stores didn't carry this size. Amazon delivered in two days. The price was good and the product quality was also good.