The RUKO HSS bi-metal hole saws in this 8-piece set have varied tooth spacing and are suitable for unalloyed steel (up to 700 N/mm² strength), non-ferrous and light metals, plastics, plasterboard and light building boards, fibreboard, plywood and wood. They are particularly suitable for use with hand drills, pillar drills and lathes. * 6 hole saws, diameters: 22, 29, 35, 44, 51 & 68mm * Separate arbors allow saws of different diameters to be rapidly exchanged * Holesaws 30mm and under use arbor type A4, which has a 6mm diameter round shank * Holesaws 30mm and over use arbor type A2, which has an 11mm diameter hexagonal shank * High rotational precision * Sturdy construction * Positive chipping and cutting angles ensure more aggressive cutting * Varied toothing ensures smoother cutting, less effort, less vibration and heat production during cutting, giving up to 3x longer tool life * HSS bi-metal with compound teeth * Good chip removal * Slots in the jacket side assist removal of cutout material * Supplied as a 8-piece set (6 holesaws + 2 arbors) in a handy plastic storage case * RUKO type 106 340 https://elecena.pl/product/27200926/ruko-106340-hss-bi-metal-hole-saw-set-with-variable-toothing-8pc 2024-11-09 https://elecena.pl/product/27200926/ruko-106340-hss-bi-metal-hole-saw-set-with-variable-toothing-8pc 2026-07-04