The 220 two star double-ended pin vise Features: one square end chuck (0 - .025 opening) and one round end chuck ( .035 to .115 opening). The overall length is 4.25.Specs amp; FeaturesDouble EndedApplication: Provide a handle for various drill bits or probes., Quality: , Surface Resistivity : Conductive, Shape: Straight, Material: SS, OAL: 4.5 (112.5mm), Body Width: 0.285 (7.13mm), Body Height: 0.316 (7.9mm), Tip Width: .035(.88mm) -.115 (2.88mm)