Tried using the tool with a big block of chocolate, but it didn't produce the long curls that we expected. As the blade was cutting, the chocolate just crumbled and didn't curl at all. Maybe I am not doing it correctly, but I wouldn't know because there isn't an instruction booklet. Regardless, the product seems very durable the the blade is sharp. If you are looking for a chocolate shaver to make curls for cake decorating, don't waste your money.