Abstract: The present invention relates to a new device for protecting wires and tubes that must be placed thru the apertures in building panels or studs made of steel or the like. The protection device disclosed herein includes a single piece, plastic body having a wall surface which is bowed on opposing sides and flanged along its periphery. On opposing sides of the outer surface of the body's wall is arranged a single protruding ridge or a plurality of protruding, angled pins or male nubs which securely hold, in the gap formed between the wall flange and the ridge/male nubs, the opposing rims of an aperture in a metal stud that this device is designed to be securely attached to. The body of this device can be of any size or shape, including but not limited to square, rectangular, oval or cathedral shaped.