The SHAPE ROD BLOC WITH THREADS features (1/4-20 and 3/8-16) threaded holes underneath the ROD BLOC that are used to attach components such as MAGIC ARMS, SPIGOTs, etc.
Enabling the accessory to slide along the rods, the SHAPE ROD BLOC WITH THREADS secures the attached component by simply tightening the single red knob. Made of lightweight anodized aluminum, the SHAPE ROD BLOC is strong and durable.