Bit selector

According to the bit selector provided by the utility model, the first box body is provided with the first mounting hole for fixedly mounting the air cylinder main body, and the second box body is provided with the second mounting hole communicated with the cavity, so that the stable mounting of the clamping air cylinder assembly is realized; the problem that in the prior art, due to the fact that installation of the clamping air cylinder assembly is not stable, the jacking screwdriver head fails is solved. The sensor is arranged in the cavity, the sensor is inserted into the lower portion of the cavity, and when the screwdriver head is in a tight jacking state, the end, inserted into the cavity, of the screwdriver head can be tightly attached to the sensor in an abutting mode, it is guaranteed that the screwdriver head is accurately monitored and recognized by the sensor, and therefore the technical effect of improving the use experience and operation efficiency of an actual operator is achieved; therefore,