The special "bridge" welded into Big Horn's 4-inch left hand bridge clamp allows it to jump over the hard wire or cord in the hose, applying all the clamping force against the body of the hose. At a little under 3/8-inch wide, these clamps easily position on the hose, sealing it to the fitting better than wider ones available elsewhere. The key handle allows it to be tightened tool-free for added convenience. You will find these clamps extremely convenient in your workshop. Please note these are left hand spiral: As the spiral moves away from you, it turns to the left, or counter clockwise. 5-pack. (See Big Horn 11712 and 11714 if you need right hand bridge clamps. ).