Tensioner Kits include stainless steel, M6 threaded tensioner screws with a cradle to match directly with a 15mm axle or the (included with the frame) 10mm axle adaptor kit.
The black anodised adjuster knob is made from aluminium and threads over the tensioner screw. The M6 stainless steel set screws are used to lock down the adjuster knob once proper tension is achieved.