The three-part insulation with white underlayer provides a warning sign that insulation may be compromised. The durable, molded insulation meets or exceeds. For single, multiple and fine stranded conductors with plastic or rubber insulation max. 5.0 mm diam. or respondent 10.0 mm2 cable cross section. Easy adjustment to the required diameter of solid or stranded wire with knurled screw and lock nut. Made of special tool steel, oil-hardened and tempered.