I bought this hoping it would be deep and narrow enough to fit between the sink and the wall. Unfortunately it was still too wide to fit the narrow hole and I had to use a small screwdriver and needle nose pliers to get the job done. I wish it worked for what I wanted but I saved myself. This is for a possible need for a shower tray where it can go where I need it. Borrowing from other comments, I agree that this tool loses sharpness very quickly. Mine became dull trying to fit it between the back of the sink and the wall. I also used a sealant softener product. The seal I was trying to remove was an inside and outside seal and admittedly very strong. I think this works a lot better with bathroom caulk, which is a lot softer.
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