Single hole fixing cleats, they are adjustable in diameter to accommodate a range of cable sizes. Manufactured from low density black polythene, which has good resistance to sunlight and a wide range of chemicals and oils.,Fixing Method - The cleat is opened up and placed around the cable so that the end of the cleat containing the slot will be in contact with the mounting surface. Except for stock no. 612-877, which should be reversed so that the slot is uppermost. In this case an M5 washer should be used to prevent the nut entering the slot in the cleat.