These brass knuckles are made 100% from brass. This product is tough and durable so it will last for years. You can’t find these brass knuckles just anywhere. With four 1 inch finger holes and weighing in under a pound. Each piece is hand made with care and consistency. tested for durability. Overall Length: 5.05 Inches Overall Width: 2.9 Inches Thickness: 0.45 Inches Hole Size: 1 Inch Weight: 0.77 Ibs.