The cordless brush cutter b 3548 li has a stable head with 4 blades as well as a thread bobbin with a 2 mm thread diameter the thread can be extended by tapping the bottom of the trimmer head the shaft is made of light aluminum and can be broken down into two parts the motor is brushless and therefore guarantees maintenance free operation the device can be operated alternatively with the additionally required 2 ah or 4 ah 48 volt li ion battery from the 48 volt system technical specificat