I'm giving 4 stars because the cutting blade goes so deep. Being a bolt-on, single pot cutting disc, it ended up under the protection of my angle grinder and I didn't expect this to happen. The incisions made were in a shallow hole, so I didn't feel this was too much of a safety issue. When cutting outdoors, make sure the angle grinder guard covers the disc. When cutting, it went through some of the steel posts as if they weren't there and I wasn't worried about it failing. I use a 7 ampβ¦