16MM-50MM Circular Saw Blade Reducting Rings Conversion Ring Adapter Washer Cutting Disc Inner Hole Adapter Rings
https://www.vogueparade.com/shopping/EN/100006471/1/1005003290064179/16mm-50mm-circular-saw-blade-reducting-rings-conversion-ring-adapter-washer-cutting-disc-inner-hole-adapter-rings//