This clamp - on rod holder has a 316G polished stainless steel tube with a hard plastic liner has closed bottom with drain hoes to protect rod.360 rotation.316G stainless steel clamp - Easy fit to any angle rail. - Note: The hex socket bolts will need to be trimmed to suit Rails below 27mm Diameter - Part number - Pack SizeLengthShaft Inside Diameter - Shaft Outside Diameter - Suits Rail Size - Centre to Centre Screw Distance - SAW-49129Single235mm43mm50mm25mm - 32mm34mm - SAW-49129-BULK16 Pack235mm43mm50mm25mm - 32mm34mm