Knightsbridge
Knightsbridge 20mm Holesaw Drill Bit Accessory Knightsbridge HS20MM bathroom shelf lighting, mini spot lights, niche lighting, staircase lights, brass
£5.80
https://www.bltdirect.com/ Go to shop Description
A 20mm holesaw drill piece that features hardened HSS teeth. Bi-metal holesaws in common electricians and downlight cut-out sizes this doesnt include the Arbour.