Irwin Blue Groove 4X Flat bit
Great flat wood drill bit from Irwin which makes drilling through joists and rafters easy. The hole is cleared of sawdust as the drill goes in which stops that nasty burning smell associated with normal flat bits. Available in our DIY Superstore right now! For a full review of these great drill bits, see here: https://www.diydoctor.org.uk/product-...