These 3 x 4 inch magnetic C-channel cardholders provide secure, adhesive-free label display on ferrous metal surfaces. Built from .060" thick magnetic material with a black finish, each unit grips metal racks and shelving firmly without tools, fasteners, or surface prep — and relocates instantly when layouts change.

Ideal for warehouse rack identification, manufacturing floor bin labeling, distribution center shelving, and retail storage systems, these cardholders keep label locations clearly visible and consistently positioned across high-density storage environments.

Each cardholder ships with white inserts included, eliminating the need for a separate insert order before first use. Cases contain 25 units and ship via parcel carrier.