Dumont Pattern 7 Carbon Steel Tweezers are excellent tweezers for handling all miniature and micro-miniature parts and components. In watchmaking this is commonly known as a hairspring tweezer. The shape permits the user to rest his hand on the bench during assembly operations. The curved shanks have beveled edges, points have a plain finish, but are very sharp. Hardness: very hard. Not Non-magnetic, poor corrosion and acid resistance. Overall length 4 1/2" (114 mm).