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Milwaukee 2864-20 Fuel One-Key 3/4" High Torque Impact vs SundpeyPRO Cordless Impact Wrench 750Ft-lbs -

Updated August 2026 — Milwaukee 2864-20 Fuel One-Key 3/4" High Torque Impact wins on brand trust and features, SundpeyPRO Cordless Impact Wrench 750Ft-lbs - wins on weight.

The Milwaukee 2864-20 offers superior torque and performance, making it ideal for heavy-duty tasks, while the SundpeyPRO is a budget-friendly option for lighter applications.

Why Milwaukee 2864-20 Fuel One-Key 3/4" High Torque Impact is better

Torque

Milwaukee delivers 1,200 ft-lbs vs SundpeyPRO's 750 ft-lbs

Brand Reputation

Milwaukee has a strong market presence and positive reviews

Performance

Milwaukee is designed for heavy-duty applications

Why SundpeyPRO Cordless Impact Wrench 750Ft-lbs - is better

Price

SundpeyPRO is priced at $69.98 vs Milwaukee's $319.99

Battery Included

SundpeyPRO comes with two 4.0Ah batteries

Weight

SundpeyPRO is lighter at 9.48 lbs compared to Milwaukee's weight

Overall score

Milwaukee 2864-20 Fuel One-Key 3/4" High Torque Impact
85
SundpeyPRO Cordless Impact Wrench 750Ft-lbs -
65

Specifications

SpecMilwaukee 2864-20 Fuel One-Key 3/4" High Torque ImpactSundpeyPRO Cordless Impact Wrench 750Ft-lbs -
Max Torque1200 ft-lbs750 ft-lbs
Bestseller Rank1581558122
Battery TypeBare Tool2 x 4.0Ah
Speed SettingsN/A3
Overload ProtectionRedlink Plus50A/60A

Dimension comparison

Milwaukee 2864-20 Fuel One-Key 3/4" High Torque ImpactSundpeyPRO Cordless Impact Wrench 750Ft-lbs -

Price Comparison

When it comes to price, the SundpeyPRO Cordless Impact Wrench is significantly more affordable than the Milwaukee 2864-20 Fuel One-Key Impact. Priced at $69.98, the SundpeyPRO option is about 78% cheaper than the Milwaukee model, which retails for $319.99. This substantial price difference makes the SundpeyPRO a tempting choice for those on a budget or for casual users who may not need the robust features of higher-end models. However, the Milwaukee model has a history of strong performance, evidenced by its bestseller rank of 15,815, indicating a strong market presence and user preference.

Torque and Performance

The Milwaukee 2864-20 Fuel One-Key Impact boasts impressive torque specifications, delivering up to 1,200 ft-lbs of fastening torque and 1,500 ft-lbs of nut-busting torque. This level of performance positions it as a powerful tool for heavy-duty applications, making it suitable for professional use. In contrast, the SundpeyPRO offers a maximum torque of 750 ft-lbs (1,000 N·m), which, while sufficient for various tasks including automotive repairs and light construction, may not handle the toughest jobs as effectively as the Milwaukee. The significant difference in torque output highlights the Milwaukee's advantage in demanding environments.

Battery and Charging

Battery performance is another critical factor in choosing between these two impact wrenches. The SundpeyPRO comes equipped with two 4.0Ah lithium-ion batteries, providing extended usage time and reducing the hassle of frequent recharging. The Milwaukee model does not include a battery in the bare tool offering, meaning additional costs may be incurred for a compatible battery. This convenience of ready-to-use batteries with the SundpeyPRO makes it a more user-friendly option for those who need a tool that’s ready to go right out of the box.

Design and Weight

In terms of design, the Milwaukee impact wrench is compact, measuring 8.59 inches in length, making it one of the most compact high torque impact wrenches in its class. This can be a significant advantage in tight spaces. The SundpeyPRO, while slightly larger at 13.39 x 10.04 x 4.13 inches and weighing 9.48 lbs, is designed for comfort with ergonomic grips that minimize hand fatigue. While both tools prioritize ease of use, the Milwaukee’s compactness might appeal more to professional users who frequently work in confined areas.

Speed Settings and Control

The SundpeyPRO impact wrench features three adjustable speed settings, allowing users to tailor the tool’s performance to their specific needs, whether they are tightening or loosening bolts. This versatility can be particularly beneficial for a range of applications, from automotive work to DIY projects. The Milwaukee model, while lacking multiple speed settings, focuses on delivering maximum power efficiently, which may be preferable for users who prioritize raw performance over adjustability.

Overload Protection

Both tools incorporate safety features to protect against overload conditions. The SundpeyPRO offers 50A overload protection for the motor and 60A for the battery, ensuring longevity and reliability in performance. The Milwaukee 2864-20 is equipped with Redlink Plus intelligence, which prevents damage from overloading or overheating. While both systems provide essential safety measures, the Milwaukee's advanced technology may give it a slight edge in preventing damage during heavy-duty tasks.

Brand Reputation and Sales Rank

Brand reputation plays a crucial role in tool selection. Milwaukee is known for its high-quality, durable tools, and its products often receive positive reviews from professionals. The Milwaukee 2864-20 has a bestseller rank of 15,815, indicating a solid foothold in the market. Meanwhile, the SundpeyPRO ranks lower at 58,122, suggesting it may not yet have the same level of recognition or trust among users. This difference in brand reputation could influence buyer decisions, especially for those seeking reliability in professional settings.

Which should you buy?

Ultimately, the choice between the Milwaukee 2864-20 Fuel One-Key Impact and the SundpeyPRO Cordless Impact Wrench boils down to your specific needs and budget. If you require a powerful, high-torque tool for heavy-duty applications and are willing to invest more, the Milwaukee is a strong contender. However, if you are looking for a budget-friendly option that covers basic needs and offers practicality with its included batteries and ergonomic design, the SundpeyPRO is an excellent choice. Both tools have their merits, so consider where and how you plan to use them before making a decision.