These Forgefix flat Bellwire Cable Clip Flat Grey 4.00mm  have hardened masonry nails for increased efficiency, and which will fix into timber, blockwork and mortar. The nail should not be hammered directly in brick, and fixing into mortar is recommended.

Application:
For fitting bell wire cable to timber or masonry in audio, visual and both commercial and domestic cabling.

FORFCC4G

Cable Clip Flat Grey 4.00mm Box 100