1. How big is the purchase, that is, how big is the electric drill that can be used. The bigger the bigger the drill is, the more expensive it is. As far as I personally feel, the maximum 20mm drill bit is enough for home, the one I bought. The maximum is 16mm.
2. The same model, there are some additional functions, for example, the R in the model indicates that the drill can be reversed. This has the advantage that when you use the forward rotation, you can use the reverse test. Try, in terms of my experience, it is still very useful, E in the model means that the drill can be adjusted, of course, it is also beneficial, you can use low speed when you do not need such a high rate, of course, these two The function, the price will be higher, the specific choice is not used, it depends on your choice.
3. In the case of insufficient budget, choose a moderate price.
