For starting nuts with 4-40 to 5 1/16 in. and 2.5mm to 8mm threads. Releases automatically as threads are engaged. Length 130mm (5 1/8 in.). Allows access to restricted spaces, Maksymalny gwint = 5 1/16 in, 8mm, Minimalny gwint = 4-40, 2.5mm, Typ działani