Significantly reduce the risks involved with boring holes through rubber and cork stoppers with this Cork Boring Machine.It is ideal for drilling uniform and straight holes into cork or rubber stoppers. Made from a cast iron frame with wooden platform (10cm diameter) to support. Adjustable height to make it comfortable to use. Complete with set of 12 Nickel-plated borers of various cutting sizes. The base plate has 4 pre-drilled holes for mounting to a table-top to keep the boring machine stable during use.12 Nickel-plated borers are included of the following diameters:4.35mm5.50mm6.00mm6.50mm8.25mm9.75mm10.50mm12.60mm13.60mm16.00mm16.60mm19.00mm