Sanding Block Set

I give it a 4 because it didn’t come with instructions. One piece is only rubber and I don’t know what it’s for. The large tear drop piece in the top right corner of the picture. Help me out if u can. Let me know. Thank you.

I do like them

Works as advertised. Ive used it on one project so far - picture frames. There were two profiles, one convex and one concave, and this made it a lot easier to sand the pieces.