You can tell by looking at the price, it must be brushless.
The difference between them is quite big. First of all, the structure is different. The brushed electric drill is composed of a stator, rotor and carbon brush commutator. The stator is a plurality of symmetrical coil windings; then the DC motor needs commutation, and the carbon brush commutation is a brush motor, generally a series motor, which has the characteristics of low cost, easy start, and soft characteristics, but the efficiency is low. The brushless DC motor is electronically commutated, with high efficiency, small motor size, and more durable without carbonic acid, but the cost is high. The brushed motor is a traditional product, and its performance is relatively stable. The brushless motor is an upgraded product, and its life performance is better than that of the brushed motor, but its circuit is more complicated, and the requirements for component selection are stricter, so it is more expensive. The brushless motor can work continuously for about 20,000 hours, and the conventional service life is 7-10 years; the brushed motor can work continuously for about 5,000 hours, and the conventional service life is 2-3 years. The power consumption of the brushless motor is 1 /3. This is probably the case. I won’t talk about the principles that are too complicated here. I will just write the advantages and disadvantages and where it is good. This may be more intuitive to understand. So the suggestion here is to buy professional brushless electric drills with high quality requirements; if you are looking for cost-effective and use them infrequently for home use, you can buy brushed electric drills, which are ordinary electric drills.