Draper D20 20V Brushless Mid-Torque Impact Wrench, 1/2" Sq. Dr., 400Nm (Sold Bare)

The Draper D20IW400/2 is a professional-grade 20V brushless mid-torque impact wrench that steps up performance significantly from standard impact wrenches — delivering up to 400Nm of maximum torque with five selectable electronic torque presets for precise, repeatable fastening across a wide range of applications.

Designed for mechanics, fabricators, and construction professionals who regularly work with larger fasteners, structural bolts, and automotive components, the D20IW400/2 combines raw power with intelligent torque control — a combination that protects threads, prevents over-tightening, and ensures consistent results across every fixing. The protective bump cover adds durability in demanding environments, while the belt clip keeps the wrench accessible and hands-free between operations.

Sold as a bare tool and powered by Draper's D20 20V Li-ion battery platform, the D20IW400/2 integrates directly into any existing D20 setup. For those new to the D20 range, compatible batteries and chargers are available separately.

Key Features & Benefits:

Brushless Motor for Maximum Efficiency
The high-performance brushless motor runs cooler, more efficiently, and with substantially greater longevity than brushed equivalents — delivering extended runtime per charge and significantly reduced wear over the tool's service life. For professionals running this tool through a full working day, that efficiency translates directly into productivity.

400Nm Maximum Torque
With 400Nm of maximum torque — 60% more than the D20IW250 — the D20IW400/2 handles fastening tasks well beyond the capability of a standard impact wrench. M16 and M20 structural bolts, heavy commercial vehicle wheel nuts, plant and machinery fixings, suspension components, and torque-critical engineering fasteners are all within its working range.

5 Electronic Torque Presets
The standout feature of the D20IW400/2 is its five selectable electronic torque settings — 100Nm, 150Nm, 200Nm, 300Nm, and 400Nm — allowing precise torque selection to match the fastener specification. This is particularly valuable in automotive and engineering contexts where over-tightening can damage components, strip threads, or create safety risks. Select the appropriate setting, drive the fastener, and rely on the tool to stop at the right point — every time.

1/2" Square Drive
The industry-standard 1/2" square drive accepts the full range of impact sockets — deep, shallow, metric, imperial — as well as socket adaptors and extension bars. No specialist accessories required; it works with the socket sets most professionals already own.

Super Bright LED Worklight
The integrated LED activates during use to illuminate the fastener and surrounding work area — essential when working in engine bays, under vehicles, in confined plant rooms, or on site in low light conditions.

Protective Bump Cover
The rubber bump cover shields the tool body from knocks, drops, and abrasion in workshop and site environments — extending the working life of the wrench when used in demanding conditions where tools inevitably come into contact with hard surfaces.

Belt Clip for Portability
The integrated belt clip allows the wrench to be secured to a belt or tool belt between fixings, keeping both hands free for component handling and reducing the risk of the tool being set down on a workshop floor or scaffold.

5 Torque Presets — Practical Applications:

Always refer to manufacturer torque specifications for safety-critical fasteners.

How It Compares to the D20IW250:

Both the D20IW250 and D20IW400/2 share the same D20 battery platform, brushless motor technology, and 1/2" square drive. The key differences are torque output and control. The D20IW250 delivers 250Nm with variable speed trigger control — well suited to general fastening and wheel nuts on standard passenger vehicles. The D20IW400/2 delivers 400Nm with five electronic torque presets — the better choice for heavier commercial applications, engineering work, and anywhere that precise, repeatable torque output matters.

Battery & Compatibility:

The D20IW400/2 accepts any D20 20V Li-ion battery — 1.5Ah, 2.0Ah, 3.0Ah, or 4.0Ah — from Draper's D20 interchangeable cordless platform. If you already own D20 batteries from another tool in the range, this wrench slots straight into your existing setup without any additional battery investment. For higher-demand applications, a 3.0Ah or 4.0Ah battery is recommended to maximise runtime between charges. Batteries and chargers are sold separately.

Specification Summary:

Warranty:

The Draper D20IW400/2 is covered by a 24-month manufacturer's warranty as standard. Register your tool with Draper to extend this to 36 months at no additional cost — providing an extra year of manufacturer-backed protection on your investment.

Does the Draper D20IW400/2 come with a battery and charger?
No — the D20IW400/2 is sold as a bare tool. D20 20V Li-ion batteries and chargers are available separately, or any existing D20 battery from the Draper D20 range can be used directly.

What are the five torque settings on the D20IW400/2?
The five electronic torque presets are 100Nm, 150Nm, 200Nm, 300Nm, and 400Nm, selectable to match the torque requirement of specific fasteners and applications.

What is the difference between the Draper D20IW250 and D20IW400/2?
The D20IW250 delivers 250Nm with variable speed trigger control. The D20IW400/2 delivers 400Nm with five selectable electronic torque presets — making it the better choice for heavier applications and anywhere precise, repeatable torque output is required.

Can the Draper D20IW400/2 be used on commercial vehicle wheel nuts?
Yes — with up to 400Nm of torque, the D20IW400/2 is capable of handling wheel nuts on larger commercial vehicles and vans when used with appropriate impact sockets. Always verify torque specifications for safety-critical applications.

Is the Draper D20IW400/2 compatible with all D20 batteries?
Yes — the D20IW400/2 is part of the D20 20V interchangeable battery system and accepts any D20 Li-ion battery regardless of capacity.