CS812 Cable/Conduit to Stud Attachment accommodates EMT conduit and MC/AC cable. Easily locates the fastener on the stud, keeping your conduit in line with box knock out and H-series brackets. Easlily locate the fastener on the stud, keeping your conduit in line with box knock-out. 1/2" & 3/4" MC/AC cable/conduit to stud.