Tweezers kits are made of high quality durable stainless steel that can withstand most acid.The surface is coated with special material for improved anti-static effect.Made of magnetic, acid and corrosion free durable canvas, the tweezers pack with storage bag provides full protection and makes storage and transportation easy.Lightweight and convenient design improves tweezers portability.9 tweezers and Crowbar can be configured for a variety of purposes, making it ideal for precision circuit boards, jewelry, crafts, laboratory work, picking small items and more.