1/4 x 1-1/4 Inch 70PCS Concrete Screws, Hex Head Screws Anchor with Drill Bit, for Masonry, Block, Brick, Cement, Stucco, Diamond Point

I used these to anchor a birdhouse post to concrete pad. Included 3/16 concrete bit was good for about 6 holes (even wet). Similar to tapcon, but less costly.

Worked well, good price and the parts tray is such a good idea

The screws hold well. My only complaint is that the drill bit is a joke. I would have given a 5 star if the bit had worked for even one screw. I'm writing this so customers will know they will still need to buy a bit for the screws

These masonry screws are very strong and they stand up to concrete, block and brick. Whatever the steel is, it sure is strong. The threads definitely cut into the hard material and don’t flatten out. I was kind of surprised how well they hold up. But, when I tried using a standard screwdriver in the slotted head, it was not a good idea. I found that more leverage is needed and the hex head works much better at holding the tool. Using a socket wrench stays on the head and the handle gives enough force. I do have to go pretty slow though and work on keeping it straight. They provided a masonry drill bit for the pilot hole (you do need to drill a hole as deep as you want to go with the screw), but more will be needed. It isn’t going to drill 40 holes in hard material for all of the screws in the box. Overall, these are quality masonry screws and they do a good job.

I was initially impressed with the look and construction of these screws. The coating is heavy and the threads appear well defined and sharp. The included drill bit looked promising and the correct size.I achieved some level of success with these, but it could have been better. I used these to attach some wood framing to my basement floor. The drill bit actually did a nice job with my hammer drill to cut/pilot through the concrete floor. However, it quickly bent slightly after about 5 holes (could be user error, but good drill bits can handle some flexing).Upon blowing the dust out and drilling in the fasteners, I found they had a lot of trouble cutting into the concrete floor. I snapped the heads off of two of them. After backing a few out that were struggling, I saw the threads had worn down significantly. However, those that drove home were able to secure the framing decently strong enough.My concern lies with the steel these are made of. I'm not convinced it's strong enough. They're great for concrete masonry blocks, but I'd avoid concrete floors personally.

These are a very secure fastening method, but the masonry bit needs to fit into the chuck plus drill 1/2" deeper than the screw length. A longer bit is needed. For precise positioning, drill right through a board and into the masonry. For best hold, place screws in solid masonry or concrete - not a mortar joint or well of a block. It is important to choose the correct length, diameter, and head design for the job. For longest masonry bit life, use a hammer drill instead of conventional, and clear dust from the hole regularly as you drill. Don't overheat the bit tip, or the brazing will melt and the carbide will disappear. Chances are that you will need additional bits to drill 100 holes. Save the literature, because the correct bit diameter is critical to screw holding power. It is a special, odd-ball sized bit.

Every once in a while, I need to fasten something to concrete. These screws are the perfect length to attach a 2x4. I've only used one so far, but it - and the included masonry drill bit - worked perfectly. I used a hammer drill to drill the hole, which is the only way to go with a masonry bit. The bit still seemed like new after drilling the hole, but your results may vary after dozens of holes. The screw drove well and tightened up like it should. The sturdy plastic case will help me keep the screws and bit together in my hardware cabinet. If you need good concrete screws, look no further.

They work but you just need a hammer drill to pierce the hole on stucco.