Note: the QFM coating sandability meter dry evaluation primer, putty sanding pros and cons of the device. The device towards the determination of primer, putty sample back and forth grinding, polishing times can be counter directly read, according to the weight of the load, grinding times and wear, and can assess the primer, putty-resistant polished performance. This instrument uses a magnetic plate, loading and unloading easy style. The main technical parameters: 1 friction speed: O - 135 times / min (one way) 2 set number range: 0 - 9999 (two-way count) Note: several times x2 polished 3 Load the number: grinding head: 570 ± 20 g; 4 Additional dispel code: 50 g, 100 g, 200 g, 5 Power: 220V 50Hz 6 power: 60W 7 Dimensions: 300x280x380 8 Weight: about 25kg