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The CP-475 is a set of two cable pulleys designed to help install electrical, COAX, network, and other various low voltage cables. With their swivel snap hooks, deep grooves, and anti-friction bearings, these pulleys keeps cables aligned with the direction of the pull, preventing snags and kinks.

Pulley for Low Voltage Electrical, Network, & COAX Cables (2 pack) | Jonard Tools