Here is the brief comparison of the three electric screwdrivers of INDE Enteprises so that you can decide your purchase based on the comparison below:

CONOS High Reliability Electric Screwdriver RE-4800P: This is a corded electric screwdriver with a brush motor. It features a torque range of 0.1-2.0 Nm and a speed range of 800-1,200 RPM. It is lightweight and ergonomically designed for comfortable use, and its torque is adjustable using a dial on the handle. However, as a corded screwdriver, its range of motion is limited by the length of the power cord.

CONOS Highly Reliable BRUSHLESS type Electric Screwdriver RE-618BL: This is a corded electric screwdriver with a brushless motor, which provides increased durability and efficiency compared to a brushed motor. It features a torque range of 0.3-4.0 Nm and a speed range of 800-1,200 RPM. It is also lightweight and ergonomically designed, with an adjustable torque setting on the handle. However, like the RE-4800P, its range of motion is limited by the power cord.

BRUSHLESS Torque Controlled Electric Screwdriver BSD-418: This is a cordless electric screwdriver with a brushless motor, which provides increased durability and efficiency compared to a brushed motor. It features a torque range of 0.5-8.5 Nm and a speed range of 300-900 RPM. It is also lightweight and ergonomically designed, with an adjustable torque setting on the handle. However, as a cordless screwdriver, its range of motion is limited by the battery life.

In summary, the CONOS High Reliability Electric Screwdriver RE-4800P and the CONOS Highly Reliable BRUSHLESS type Electric Screwdriver RE-618BL are both corded electric screwdrivers with adjustable torque settings, but the RE-618BL features a brushless motor for increased durability and efficiency. The BRUSHLESS Torque Controlled Electric Screwdriver BSD-418 is a cordless screwdriver with a brushless motor and a wider torque range, but its range of motion is limited by the battery life. Ultimately, the best option for you will depend on your specific needs and preferences.