"Used a pack of these recently to bolt down some heavy steel posts to a concrete floor. They slip into the hole easily, needed a tap with the hammer to set them to the right depth and then once in the hole torqued up easily and quickly. I usually use the Multi-Monti concrete screws for this type of work but had run out. I prefer the Multi-Monti as they provide a fantastic grip and clamping force. Given they're around the same price I'll stick to the Multi-Monti but would use these again if the latter was out of stock."