Core drill bit for concrete SDS-plus 68 mm

Volat core drill bit for concrete SDS-plus 68 mm. The 68 mm diameter is the European standard for flush-mount electrical backboxes - the right hole for recessed sockets and switches. SDS-plus shank fits directly into the rotary hammer chuck without an adapter. Diamond segments on the crown cut concrete and brick without large cracks around the hole. If you are not sure what size to order for wall sockets - 68 mm is almost certainly the answer. Use with hammer mode on concrete and brick. On aerated concrete and drywall - no hammer, or the material chips badly. Water cooling extends crown life when drilling reinforced concrete.