SHEILD ROCK 41x21 mm Concrete Insert Channels are the ideal solution for embedding within concrete in projects requiring low profile and space saving. These channels are integrated into concrete ceilings or walls during the pouring process, providing a permanent mounting track ready for use once the concrete sets. Due to their compact size (21 mm), they are perfect for applications requiring limited pour depth, while ensuring the structural strength needed to fasten light to medium electrical and mechanical systems without the need for traditional drilling operations.