Irwin
Irwin IRWIN® Wood Auger Drill Bit Long Series 25 x 400mm 10502775
Model 10502775
Best price
Lowest we’ve seenWhere to buy
| Retailer | Price | Availability | Visit |
|---|---|---|---|
| Cheapestchecked an hour ago | £28.95£46.14 | In stock | Visit Tooled Up (opens in a new tab) |
 checked an hour ago | £33.22 | In stock | Visit Blueperry agriculture (UK) (opens in a new tab) |
 retailer's price from 16 Jul 2026 | £37.42 | 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 long series auger drill bit has a 25mm diameter and 400mm overall length, suited to deep boring in wood for structural timber work, running services through thick beams, and heavy post installation. It offers general-purpose wood boring performance across a range of applications requiring both large diameter and extended reach.
A single spur cutting edge scribes the hole's circumference for a smoother finish, while the hexagon shank prevents slipping in a drill chuck or bit extension. The solid centre adds rigidity to reduce deflection when boring deep holes, and the self-feeding screw point speeds up boring in soft and hard woods. The body is fully hardened from tip to shank for added durability.
Working length is given as either 335mm or 323mm depending on source, with a total length of 400mm and diameter of 25mm.
| Drillbit diameter | 25.0mm |
|---|---|
| Total length | 400mm |
| Working Length | 323mm |
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