Did you know? Andreas Stihl patented the first electric chainsaw in 1926 and the first petrol chainsaw in 1929 — earning the title Father of the Chainsaw.
Did you know? Johan Petter Johansson invented the modern adjustable wrench (spanner) in 1892 while working at Bahco — the tool used by every tradesperson today.
Did you know? A British company that manufactures router cutters, saw blades, and the famous AirShield Pro — one of the first powered respirators for woodworkers.
Did you know? Invented the first portable circular saw in 1927 and pioneered the dust extraction system that is now standard in professional workshops.
Did you know? Started by making carbon-filament lamps. The Philips head screw was NOT invented by Philips — it was invented by Henry F. Phillips, a completely different person.
Did you know? One of the oldest British chemical manufacturers, originally producing turpentine substitute. Their wood preservers have protected UK homes for over 145 years.
Did you know? The name comes from "Cuprum" (Latin for copper) and "Naphthol" — copper naphthenate was the original wood preservative formula invented in 1911.
Did you know? British General (BG) has been the UK's go-to brand for electrical accessories since WWII. Their white moulded sockets are installed in millions of British homes.
Did you know? Originally a mail-order screws company called "Woodscrew Supply Company". Now the UK's largest multi-channel trade supplier with 870+ stores and same-day Click & Collect.
Did you know? Owned by Travis Perkins Group, Toolstation grew from a single store to 580+ branches in just 20 years — opening a new store almost every week.
Did you know? ITS (Industrial Tool Supplies) is one of the UK's largest independent tool retailers, known for competitive pricing and fast delivery across their 30+ trade counters.
Did you know? Named after founders Richard Block and David Quayle. B&Q opened the UK's first warehouse-style DIY store in 1980, changing how Britons shop for home improvement.
Did you know? A fast-growing online-only tool retailer specialising in premium brands like Milwaukee, Makita, and DeWalt with competitive pricing and expert product knowledge.
Did you know? Started as a small family business, Power Tool Mate has become one of the UK's most trusted online power tool specialists with over 100,000 satisfied customers.
Did you know? Tools4Trade is known for their detailed product videos and expert reviews, helping tradespeople make informed buying decisions before purchasing.
Did you know? Famous for their massive 25,000 sq ft flagship store in Devon — a destination for woodworkers worldwide. They manufacture their own brand of lathes and machinery.
Did you know? SGS specialises in air compressors, generators, and workshop equipment. They design and manufacture many products under their own brand name.
Did you know? Toolden has rapidly grown into a go-to online store for tradespeople, known for their clean website design, fast shipping, and excellent customer service.
Did you know? City Electrical Factors (CEF) is the UK's largest electrical wholesaler with over 450 trade counters. They hold £150M+ of stock for same-day availability.
Did you know? One of the oldest companies in the UK, Travis Perkins traces its origins to 1797. The group also owns Toolstation, Wickes, and several other major trade brands.
Did you know? Power Tool World is a family-run business that has grown into one of the North East's largest power tool retailers with a massive online catalogue.
Compare 3 prices for Irwin 28mm x 157mm Blue Groove 4X Flat Bit — from £8.50
to £10.95 across 3 UK sellers including
I T S, Tooled Up, My Tool Shed.
Save up to £2.45 (22%).
The 28mm IRWIN® Blue Groove 4X Flat Bit is designed for heavy-duty drilling tasks in timber, ideal for large pipe installations, substantial cable runs, and major construction applications. This diameter provides significant capability for creating clearance holes for large fittings and hardware. The patented groove point and cutting edge technology ensures this 28mm bit cuts cleanly through timber without scraping, producing smooth, professional-quality holes even at this substantial diameter. Operating up to 4 times faster than conventional flat bits, it significantly reduces drilling time on larger holes, dramatically improving productivity. The parabolic scoop efficiently manages wood chip removal whilst maintaining excellent control throughout the drilling process. Engineered with an increased 17° relief angle for superior cutting efficiency and featuring a 152mm shank that's 10% larger in diameter, this bit offers exceptional durability for demanding professional applications. The robust construction resists bending and maintains accuracy even under sustained intensive use, making it suitable for the toughest trade environments. Features and Benefits: • 28mm diameter perfect for large-scale construction work • Groove point technology delivers clean, accurate cuts • 4 times faster performance improves efficiency • Enhanced relief angle for superior cutting performance • Durable 152mm shank with reinforced construction Specifications: Diameter (mm): 28 Overall Length (mm): 152 Pack Qty.: 1
