Who has upholstered furniture and used the brackets that holds the fabric, he knows how difficult it is to hammer them in with a hammer. Furniture factories for these purposes a special tool. And what about those who are not, and you want to drive more than a dozen brackets?
With sharp sheet metal and non-metallic materials are regularly confronted each homebrew. The use of manual scissors ineffective (especially for large sheets): for large labor, cut quality is poor.