Pico Sprung Hook Probes, 1000 V CAT III, Black / Red These probes feature a shrouded 4 mm socket allowing connection to a measurement instrument using a 4 mm "banana" plug test lead. The sprung hook opens up to 10 mm to hold items such as components, IC legs or small conductors. Features Length: 121 mm Height: 23 mm Hook Limit: 10 mm IEC 1010 Rating: 1000 V CAT III 20 A Colour: Black (RS 136-5326); Red (RS 136-5327)