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Milwaukee 2864-20 Fuel One-Key 3/4" High Torque Impact vs SundpeyPRO Cordless Impact Wrench 1600Ft-lbs -

Updated August 2026 — Milwaukee 2864-20 Fuel One-Key 3/4" High Torque Impact wins on brand trust and torque, SundpeyPRO Cordless Impact Wrench 1600Ft-lbs - wins on battery life.

The Milwaukee 2864-20 offers superior performance and advanced features, making it ideal for professionals, while the SundpeyPRO provides great value for budget-conscious users.

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

Performance

Higher quality motor and torque capabilities

Features

Includes One-Key technology for tracking

Brand Reputation

Milwaukee is a well-known brand in the industry

Why SundpeyPRO Cordless Impact Wrench 1600Ft-lbs - is better

Price

Significantly cheaper than Milwaukee

Battery Life

Includes two 4.0Ah batteries for extended use

Torque

Higher maximum torque rating

Overall score

Milwaukee 2864-20 Fuel One-Key 3/4" High Torque Impact
85
SundpeyPRO Cordless Impact Wrench 1600Ft-lbs -
75

Specifications

SpecMilwaukee 2864-20 Fuel One-Key 3/4" High Torque ImpactSundpeyPRO Cordless Impact Wrench 1600Ft-lbs -
Max Torque1200 ft-lbs1600 ft-lbs
Nut-Busting Torque1500 ft-lbsN/A
Motor TypeBrushlessBrushless
Battery IncludedNoYes
One-Key TechYesNo

Dimension comparison

Milwaukee 2864-20 Fuel One-Key 3/4" High Torque ImpactSundpeyPRO Cordless Impact Wrench 1600Ft-lbs -

Overview of the Milwaukee 2864-20 Fuel One-Key 3/4" High Torque Impact

The Milwaukee 2864-20 Fuel One-Key 3/4" High Torque Impact is a high-performance tool designed for heavy-duty applications. Priced at $319.99, it features a robust power state brushless motor that delivers up to 1200 ft-lbs of fastening torque and an impressive 1500 ft-lbs of nut-busting torque. This makes it a strong contender for professional use, particularly in automotive and construction settings. Its compact design, measuring 8.59 inches in length, allows for maneuverability in tight spaces, while the One-Key technology enables users to customize and track tool performance.

Overview of the SundpeyPRO Cordless Impact Wrench

The SundpeyPRO Cordless Impact Wrench is a more budget-friendly option priced at $139.99, making it about 56% cheaper than the Milwaukee model. Despite the lower price, it boasts a maximum torque of 1600 ft-lbs, which is higher than the Milwaukee's fastening torque. This tool is equipped with a brushless motor, enabling efficient performance with low noise and extended battery life. Included are two 4.0Ah batteries that can be charged in just two hours, ensuring that users have ample power for extensive tasks without long downtimes.

Power and Performance

When it comes to power, the Milwaukee 2864-20 excels with its capability to deliver 1200 ft-lbs of fastening torque and 1500 ft-lbs of nut-busting torque, making it suitable for the most demanding tasks. In contrast, the SundpeyPRO offers a maximum torque of 1600 ft-lbs, which may appeal to users needing a more powerful impact for specific jobs. However, the Milwaukee's brushless motor technology ensures consistent performance and durability, mitigating risks of overheating and overloading, thanks to its RedLink Plus Intelligence feature.

Battery Life and Charging

The SundpeyPRO comes with two 4.0Ah batteries, providing a significant advantage in terms of battery life, as each can operate for 45 minutes on a single charge. The inclusion of two batteries means users can easily swap them out, minimizing downtime. The Milwaukee model, while not specified to include a battery, is part of the M18 series, which utilizes interchangeable batteries. Users may need to purchase these separately, potentially increasing the overall cost if they don't already own compatible batteries.

Usability and Features

Usability features greatly differ between the two tools. The Milwaukee 2864-20 includes One-Key technology that allows for advanced customization and tracking, which can be particularly beneficial for professional users managing multiple tools. It is also the most compact in its class. Conversely, the SundpeyPRO features a bi-directional mode and three adjustable speed gears, catering to varying tasks from light DIY projects to heavy-duty applications. It also incorporates a reverse auto-stop function, adding an extra layer of safety during operation.

Weight and Portability

The Milwaukee 2864-20 weighs 8 pounds, which is reasonable for a high-torque impact wrench, promoting portability on job sites. Its compact size allows for easy handling and access in tight spaces. The SundpeyPRO, while its weight is not explicitly stated, is designed with user comfort in mind, featuring a non-slip handle. The additional benefit of its included carrying case enhances portability, making it easier to transport to different job locations.

Sales Rank and Popularity

The Milwaukee 2864-20 has a bestseller rank of 15,815, indicative of its popularity among users who value high-performance tools in the market. The SundpeyPRO, on the other hand, has a lower sales rank of 58,361, which may suggest that it is less favored or recognized in its category. This distinction could influence purchasing decisions, as many buyers rely on sales rank as an indicator of product reliability and user satisfaction.

Which should you buy?

Choosing between the Milwaukee 2864-20 Fuel One-Key and the SundpeyPRO Cordless Impact Wrench ultimately comes down to specific needs and budget. The Milwaukee is ideal for professionals seeking a compact, high-performance tool with advanced tracking features, priced at $319.99. However, if budget is a primary concern and higher maximum torque is a priority, the SundpeyPRO offers a compelling value at $139.99, coupled with longer battery life and essential features for varied tasks. Both tools have their strengths, making them suitable for different user preferences in the impact driver market.