An Abomination
Unequal weights and unequal measures are both alike an abomination to the Lord.
Proverbs 20:10 ESV
Don't be dishonest. This is the 3rd time that this concept of unequal weights and measures has been mentioned in Proverbs. These scales were often used in market places at the time, and some sellers used dishonesty scales as a means to get over on customers. The Lord sees everything, and He's the last one to try to get over on.