Mechanics-style impact-rated and impact-resistant gloves have padding on the back of the hand to protect against injuries caused by hazards such as falling objects, swinging chain, and impact caused by working in tight spaces. ANSI/ISEA impact-ratings test impact to the knuckles and the back of the hand. They are rated on a scale of 1 to 3, with higher levels indicating greater protection. CE-rated gloves test impact to the knuckles only and are given a pass/fail grade. Unrated impact-resistant gloves provide general protection. Mechanics-style gloves are have good dexterity and are protect hands from dirt, grime, scrapes, and blisters. They are often worn when performing basic tasks in general maintenance and repair operations. Impact-rated gloves are worn in construction, automotive, assembly, and oil and gas trades.