Aluminum Clamp-On Rod Holder Horizontal 1.315 OD Fits 1 Pipe. Smith's line of high polished aluminum clamp-on rod holders offer a great alternative to stainless steel. These rod holders are constructed of marine grade aluminum that has been 100% anodized for functionality and style. These rod holders feature a super strong 3/8 thick blade, rugged welded 1/3 tall gimbal bar, and a 1-5/8 inside diameter with a flared opening to make it easy to insert a rod in the holder. The taper liner and the addition of a rod security hole in the blade ensures that your valuable rods are protected. These aluminum clamp-on rod holders are precision machined to create an exacting slip resistant fit on marine aluminum boat rails and tower, and they prevent the risk of welding heat damage to any cables inside. With 5 available sizes in both vertical and horizontal clamps, complete with 316 stainless screws, these clamp-on rod holders are ideal for easily adding as many rod holders as you want Aluminum Clamp-On Rod Holder Horizontal 1.315 OD Fits 1 Pipe. Smith's line of high Manufactured by C.E. Smith. Part Number 53710