Rigid Coupler 5mm, 6mm, 6.35mm or 8mm shafts to 8mm, 10mm or 12mm smooth rod or threaded rod 5mm to 8mm, 6.35mm to 8mm 8mm to 8mm, 8mm to 10mm L22*16D with M4 Set Screw Metal Coupler made of Brass Coupler for rigid coupling in applications High Stiffness Coupler New arrival, L25*20D with M5 Set Scre...