The 4-SA three star straight tapered ultra-fine pointed tweezers is primarily used for microscopy. The overall length is 4.25. It is made of anti-magnetic Neverust stainless steel.Specs amp; FeaturesUltra Fine PointsApplication: Designed for microscopy, the tapered tips offer excellent visibility, Quality: , Surface Resistivity : Conductive, Shape: Straight Tapered , Material: Anti-Mag. SS, OAL: 4.25 (106.25mm), Body Width: .375 (9.38mm), Body Height: .06 (1.5mm), Tip Width: .005 (.13mm), Tip Height: .003 (.08mm)