Master Lock 81KM Key blank

These 81KM blanks are real Master Lock brand key blanks. They're the same quality as the keys that came with the locks I'm using. I should point out that it's really important to know the key you're buying the blanks for, as these blanks work in the locks I bought them for, but I discovered the locks actually use 81KR blanks. The KM blanks share the same basic blade silhouette as the KR blanks, but there's a 1mm difference on one side of the blade profile contour that lines the key up for easy entry into the keyway. The KM blanks will operate the lock, but take more care to get them to line up and enter the keyway. I reordered to get the correct KR blanks. Hope this helps someone else.