fischer S12 Universal Wall Anchors for Concrete and Solid Masonry, 1/2" x 2-3/8" (12 x 60 mm), Rimless Nylon, Two-Direction Expansion - 25 Units

Just google check the size you need to make sure you are getting exactly what you want. These are some of the better anchors I have used.

Good quality

Wish these came with screws to fit. This is just to big for my plans. I must not understand what 12mm really means

These are apparently are for going into concrete. It didn't work in drywall until I cut off the open end about 5/8 of an inch; then they worked fine.

worked great

It's hard to find plastic anchors this large at any hardware store. Sometimes it is nice to be able to use this kind of anchor in concrete instead of metal drop-in anchors or having to use epoxy etc. This is good for light/medium forces. These are made of nylon which is a particularly strong and durable type of plastic when used as an anchor. The drill depth for this one is at least 80mm. This is for screw diameter 8-10mm.

Fischer anchors are built to provide strong and secure fastening. They grip the base material firmly and make sure that the fixtures or objects stay in place. What I really appreciate these anchors is their 2-way expansion design. They not only dig in deep but also spread out horizontally, making sure my fixtures stay exactly where I put them. They're made from tough nylon that can take a beating. The installation of Fischer anchors are pretty straightforward to set up. Keeping in mind, these anchors are like specialists in their field. They perform their best with solid material. So, if you're working with concrete or masonry, they're a fantastic choice.

As a licensed contractor and handyman I use this type of anchor to install/hang items on a wall. I recently used eight of these to install four wrought iron plant hangers onto brick columns. The anchors worked flawlessly and are able to hold up the iron hangers, pots and soil without issue. Because the anchors expand in two direction they provide great holding power. The key to a solid installation is to drill the proper depth and diameter hole. Overall, these anchors work great and I highly recommend them when you need some real holding power.