Irwin
Irwin IWHT48443BC-0 Strait-Line Speedline Pro Chalk Reel Set IWHT48443BC-0
£15.48
Compare 1 shop · Then visit retailer
3 prices compared · £7.85–£8.95
The 21mm IRWIN Bi-Metal High Speed Hole Saw is specifically sized for many plumbing and heating applications, particularly when installing radiator valves, small bore pipes and associated fittings.
This precise diameter is frequently specified in installation guidelines, making it a must-have for heating engineers and plumbers.
Updated 3 hours ago
Blueperry Tool & Builders Merchants (UK)Lowest
In stock
£7.85
My Tool Shed
In stock · £1.10 more
£8.95
£10.55
Tooled Up
In stock · £1.10 more
£8.95
£10.55
Visit retailer opens the shop. Affiliate disclosure.
This page compares live feed prices for Irwin IRWIN® Bi-Metal High Speed Holesaw 21mm 10504166 by Irwin in Holesaws. 3 shops currently list it in the selected country. Visit retailer is an affiliate hop. You finish the order on the shop’s site.
Check the photo matches the name. If the image is missing, treat the row as incomplete. The lowest price is the lowest feed number we have — not a promise about postage, stock or the exact variant on the shop page.
We do not write retailer descriptions from scratch. Feed text is cleaned, not turned into a review. For how we match shops and when to skip a click, read how to read a listing and how we compare prices.
No reviews yet. If you bought this, write what you used it for — that helps the next shopper more than the feed description.
Checking your account…
Prices on 3 Oct 2026 · 2 recorded prices
Irwin
£15.48
Compare 1 shop · Then visit retailer
Irwin
£42.05
Compare 1 shop · Then visit retailer
Irwin
£9.57
Compare 1 shop · Then visit retailer
Irwin
£39.49
Compare 1 shop · Then visit retailer
Irwin
£13.83
Compare 1 shop · Then visit retailer
Irwin
£11.10
Compare 1 shop · Then visit retailer
Irwin
£37.80
Compare 1 shop · Then visit retailer
Irwin
£24.60
Compare 1 shop · Then visit retailer