Seesii WH9 Pro Cordless Impact Wrench 665 ft-lbs
- Item Torque: 663.8 ft-lb
- Head Style: Fixed Square
- Operation Mode: Battery
- Measurement Standard: Metric, SAE
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A 21V impact tool with a strong sales and rating track record at a manageable 1.2 kg, worth shortlisting for torque-heavy fastening jobs.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B09ZTVZG2TModel: WH9 ProCategory: Impact Drivers & Wrenches
Overview
Seesii's WH9 Pro packs 21 volts of cordless impact power into a 1.2 kilogram body, built for driving or removing fasteners with rotational hammering force rather than a straight drill chuck. Title and category agree here: this is an impact tool, not a plain drill.
Impact tools trade smooth rotation for sharp rotational hammer blows, which lets a comparatively light 1.2 kg body deliver much more twisting force than a same-weight drill could manage on stubborn fasteners.
- 21 volt power source
- Item weight: 1.2 kilograms (about 2.6 lb)
Who it's for
Fits someone assembling furniture, decking or automotive work who wants more torque than a standard drill driver provides at a similar weight. Less suited to precision work like cabinetry or drywall screws, where an impact's hammering action can overdrive fasteners.
Pros and cons
- 21V power should provide strong torque for tough fasteners
- 1.2 kg weight keeps one-handed use manageable
- High purchase volume and strong 4.6 rating
- Battery capacity and runtime not listed
- No review text to confirm real-world torque
Performance notes
The 21V pack drives the impact mechanism, which only engages its hammering action once resistance builds, so light fastening feels similar to a drill until the tool meets a stubborn screw or bolt and the torque kicks in. Weight is kept to 1.2 kg, which should ease one-handed use over a work session, though runtime and battery capacity are not stated on this listing.
Specifications
| Brand | SEESII |
|---|---|
| Model | WH9 Pro |
| Dimensions & fit | |
| Item Weight | 2.65 poundslower than 52% of 184 impact drivers & wrenches |
| Item Length | 16 incheshigher than 95% of 128 impact drivers & wrenches |
| Power & efficiency | |
| Voltage | 21 voltshigher than 83% of 171 impact drivers & wrenches |
| Construction & materials | |
| Material Type | Plastic |
| Color | Blue |
| Finish Types | Powder Coated |
| Included components | |
| Unit Count | 11.02 pounds |
| Included Components | 1* Fast Charger, 1* Impact Wrench, 1* Carry Box, 2* 4.0AH Battery Pack, 6* Impact sockets(14mm/17mm/18mm/19mm/21mm/22mm) |
| Package Quantity | 1 |
| Other details | |
| Item Torque | 663.8 ft-lbhigher than 66% of 116 impact drivers & wrenches |
| Head Style | Fixed Square |
| Operation Mode | Battery |
| Measurement Standard | Metric, SAE |
| Item Type Name | Wrench |
| Set Name | Seesii Impact Wrench Set |
Closest rivals on specs
JESIMAIK Z1320-01 1/2 in Brushless Cordless Impact Wrench- Item Torque 663.8 vs 885.1 ft-lb (-25%)
Frequently asked questions
Is the Seesii WH9 Pro a drill or an impact tool?
It's an impact tool. Both the title and category identify it as an impact driver or wrench, using hammering rotational force rather than a plain drill chuck.
What voltage battery does the WH9 Pro use?
21 volts, per the listed specs.
How heavy is the WH9 Pro?
About 1.2 kilograms, roughly 2.6 pounds, without any bit or socket attached.