These cable hooks fit up to ten 110v site cables over two hooks and remove the risk of tripping. Two adhesive grades are available. Grade I (permanent fixing) is for use on brickwork, concrete and unfinished surfaces. Grade II (temporary fixing) is for plastered and painted walls, glass, timber and steel. Grade I cable hooks feature steel columns to hold 2kg of cabling making it extremely heavy duty and Grade II cable hooks feature stretch removal technology which leaves no residue or damage and can hold 1kg of cabling. Both grades feature screw holes for heavier cables.