Wensilon(100 pcs) 5/16"-18 Premium Zinc Plated Carbon Steel Drop in Anchors Assortment, Knurled Drop-in-Anchor for Solid Concrete, Internal Forced Expansion Screw Bolts

Worked very well in in both concrete and stucco. Do make sure you use a 5/16" drill bit instead of the 3/8" recommended.Also, don't drill too deep or you will have a harder time "setting" the anchor in place using their tool.

Used these anchors to mount a manual tire changer to my garage shop floor. They worked great..

I purchased the Stainless Steel and installed two behind a water spigot whose hole was drilled too large by the person who installed it. A little PC concrete plus these anchors seem as hard as the brick I attached them to. I bought a couple of stainless steel screws locally and now my water spigot is held firmly to the brick, but I can still remove it within seconds if needed in the future. Great product!To install these easily, you needed a drop-in anchor setting tool. I didn't realize this until after I received them, so I had to delay my project a few days while I ordered and waited for the tool to be delivered. I highly recommend you guys sell a package of these with the tool, too! It would only cost a few more dollars and allow a new customer to get everything they need at once.

Good quality insert. Be aware that you don't have to buy or use the setting tool if you have the right size punch. The idea is simply to drive the internal wedge down to expand the bottom of the insert. Remember to use caution when drilling your holes. If the hole is even slightly oversized the insert won't expand enough to grip the sides of the hole. Also, keep the hole plumb or your stud will be at an angle.

Look just like the much more expensive drop in anchors.

These look like old fashioned lead anchors, but they are not !I've been working with assorted anchors for 50 years and got tripped up on these. I was looking for old fashioned split lead anchors for 3/8 bolt threads and thought these would suffice as they looked similar. In the old days, the length of the bolt was not critical because the excess length of the bolt would pass thru the anchor while expanding it. These anchors have a permanent plug which must be hammered in first to expand the anchor. This limits the screw thread length of the 3/8 bolt to only about 1/2 inch of penetration into the anchor. I was going to use this in brick for a wrought iron railing going down 6 steps. I would not trust this anchor. If your are using this anchor for a bolt which came with your device (hinges, TV mountings, etc.) you may be forced to cut and rethread the bolt. Thankfully I still have a good selection of old lead anchors, but I used all of my GOOD 3/16 and 1/2 inch bolt sizes. GRRRR !! ! ! One star if you are an oldtimer like me, 5 stars if you never used a good old fashioned split lead anchor.

I bought the 1/4"-20 anchors to insert into a 3/8" ID tube and assumed the fit issues others have mentioned was mainly from drilling runout, but the ones I received are in fact 5/16" OD instead of the 3/8" shown in the product photos. Additionally one was somehow bent at an angle and unusable. Otherwise they seem fine for use in 5/16" holes, but unfortunately not for my current project.

I suggest going smaller with the hole than they recommend. I drilled my holes to the recommend size and these would just drop in. I would set them and they would pull out without too much force. If I had it to do over again I would drill a smaller hole where I would have to hammer them in(not beat real hard). I ended up pulling mine out, installing new ones, and then using epoxy in the holes. Hold strong now.