With 90 years history, Bohle/Silberschnitt is the highest quality brand available for glass working. Bohle have been manufacturing circle cutter and replacements in Germany since the 1950s .Suitable for all airtight surfaces like glass, plastic, metal, coated wood, marble etc. Safety is Bohle's # 1 priority. All products are tested and certified to the highest standards worldwide. Bohle is a premium name, and is difficult to find at most suppliers in Australia, and when you can find them, you'll pay dearly! Art. No. 519.5, this suction replacement pads are for BO 510-516 circle cutter plastic base. Pad Size Ø 55mm