Haron B4F48 48″ (1200mm) 1/2″F x 1/2″F Steel Braided Hose XCK-T161 Shank diameter is 8mm High speed steel HSS 3208-100B Insize Limit Micrometer 25-50mm Range Series 3235-50mm

Shank diameter is 8mm

Please note the external diameter of the extension is 35mm and would only be suitable for larger size cutters should you need to pass through first cut

may remove the fastener as you drill

M10 x 20 x 1

the 24 x 75mm Annular Cutter - HSS is your go-to solution

Haron B4F48 48″ (1200mm) 1 2″F x 1 2″F Steel Braided Hose XCK T161 Shank diameter is 8mm High speed steel HSS 3208 100B Insize Limit Micrometer 25 50mm Range Series 3235 50mm Shank diameter is 8mm Please note the external diameter of the extension is 35mm and would only be suitable for larger size cutters should you need to pass through first cut