The Wychwood Solace NTS (No Thumb Screws) Fixed Buzz Bars are made from a 16mm Diameter, strong aluminium, anodized in a matte black finish. Each buzz bar incorporates a 2BA thread on each upright, designed for you to screw your bobbins/indicators into. They have our very own ergonomically designed knurling pattern the alignment collars. They three male threads enable these to be fished as a goal post style set up.