Designed for use on aluminum, copper, weatherproof coated wire, PVC covered conductors and messenger and guy strand. The Chicago style grip was designed for cable sizes from 0.12-Inch to 1.0-Inch (3.10 to 25.4 mm). Hot-line grips for both bare and insulated conductors. Grip may be placed on wire with hot-line stick. When stick is removed, latch closes automatically to guard against grip accidentally disengaging from wire. Standard hot-line grips are not supplied with springs or lock-open features.