A preacher curl bench is a must-have for anyone who wants big biceps. Preacher curl benches and attachments are incredibly effective in isolating the biceps. You can execute Preacher curls with an EZ bar or dumbbells. This exercise mainly works the lower part of your bicep, but it also works the forearm. The Deltech Fitness preacher curl bench is one of the highest quality benches on the market. Price includes shipping.