Irwin
Irwin IRWIN® HSS Cobalt Drill Bit 4.0mm OL:75mm WL:43mm 10502547
Model 10502547
Best price
Lowest we’ve seenWhere to buy
| Retailer | Price | Availability | Visit |
|---|---|---|---|
| Cheapestchecked an hour ago | £2.80 | In stock | Visit Blueperry agriculture (UK) (opens in a new tab) |
 checked an hour ago | £2.95£3.89 | In stock | Visit Tooled Up (opens in a new tab) |
 retailer's price from 16 Jul 2026 | £3.85 | In stock | Visit Blueperry Tool & Builders Merchants (UK) (opens in a new tab) |
Prices exclude delivery. We may earn a commission if you buy through these links, which never affects the ranking above — it is always cheapest first.
Price history
Full price historyThis is the lowest price we have recorded. If you were waiting for a drop, this is it.
About this product
This Irwin 4mm HSS Cobalt Drill Bit is designed for professional metalworkers drilling stainless steel and other high alloys. Commonly used for M4 clearance holes and general fabrication work, it offers reliable performance across a range of metalworking applications.
Manufactured from high quality HSS steel with 5% Cobalt content, the bit provides improved red hardness and heat resistance, giving significantly extended life when working demanding materials. A 135° split point grinding ensures accurate centring from initial contact, reducing drilling pressure, while the industrial quality ground flute design supports accurate drilling and efficient chip removal. It has a golden tempered surface finish. Overall length is 75mm with a working length of 43mm.
Features and Benefits
- :
- 4mm diameter for versatile metalworking applications
- 5% Cobalt content for superior heat resistance
- 135° split point for perfect centring and reduced pressure
- Industrial quality ground flute for accuracy and chip removal Specifications: Tip Diameter (mm): 4.0 Working Length (mm): 43 Overall Length (mm): 75 Pack Qty.: 1
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