哪款冲击起子具有最长的保修期，耐用性最好？

The FLEX FX1351-2A is a compact 24V brushless impact driver with 1800 in-lbs of torque, speeds up to 3400 RPM, and a 1/4 in hex collet. The kit includes two 2.5Ah batteries and a fast charger, making it suitable for professionals and serious DIY users who need high fastening power and convenient runtime.

The DEWALT DCF887B is a compact, brushless 20 V impact driver with three speed settings, 1825 in-lb of torque, and a 1/4 in quick-release hex chuck. It suits DIY users, contractors, and existing DEWALT battery owners who need controlled fastening in tight spaces.

FLEX 24V Quick Eject FX1371 是一款高功率冲击起子，具备 2500 in-lbs 的扭矩、三档速度设置和可单手操作的快速弹出夹头。其无刷电机和 6.0Ah 堆叠锂电池套装非常适合专业承包商和高要求的紧固应用。

Milwaukee M18 FUEL 2953-20 是一款紧凑型高功率冲击起子，具备 2000 in-lbs 扭矩、最高 3900 RPM、四模式驱动控制和 Tri-LED 照明。其仅工具设计适合已经拥有 M18 电池的专业人士、工匠和资深 DIY 用户。

The DEWALT DCF850B is a compact, cordless 20V MAX impact driver with a brushless motor, 1825 in-lb of torque, and 3250 rpm speed. Its three-speed trigger, 3-LED work light, and lightweight 2.1 lb design suit contractors, woodworkers, and DIY users working in tight spaces.

The RIDGID R862311 is a cordless brushless impact driver with three speed settings, up to 2300 in-lbs of torque, and a compact 2.3 lb tool-only design. It suits DIYers, tradespeople, and contractors who need strong fastening performance and compatibility with RIDGID 18V batteries.

The Makita XDT20 is a compact, lightweight 18V brushless impact driver with four speed settings, up to 1590 in-lbs of torque, and a top speed of 3600 RPM. Its programmable controls and assist modes suit contractors, tradespeople, and serious DIY users who need precise fastening performance.

The Kobalt KXID 1424A-03 is a 24 V brushless impact driver with 2400 in-lb of torque, a 3400 RPM maximum speed, and a 4.0 Ah battery. Its compact 1/4 in drive suits serious DIYers and professionals handling demanding fastening jobs.

This compact brushless impact driver delivers up to 1825 in-lbs of torque and 3250 RPM with three-speed control. It suits contractors, tradespeople, and DIY users who need strong fastening performance in tight spaces, and the kit includes a 5 Ah battery and charger.

The FLEX FX1371 is a high-power 24 V brushless impact driver with 2500 in-lbs of torque, three speed modes, and a quick-eject 1/4 in hex collet. It suits professional tradespeople and serious DIY users who need fast bit changes, strong fastening performance, and compatibility with FLEX 24 V batteries.

The DEWALT DCF845B is a compact, cordless 20V MAX XR impact driver with a brushless motor, 1825 in-lbs of torque, and three speed settings reaching 3400 RPM. It suits professionals, contractors, and DIY users who already own DEWALT 20V MAX batteries because this tool-only version does not include a battery or charger.

The Milwaukee M18 FUEL 2853-20 is a compact, high-power cordless impact driver with a POWERSTATE brushless motor, four-mode drive control, and up to 2000 in-lbs of torque. It is well suited to professional tradespeople and serious DIY users who need fast driving performance in tight spaces, although the tool is sold without a battery.