Descriptions：Pitch Gauge For E-FLITE 400 Belt CP / v2 Trex 450 King 2 King3 walkera Rc Helicopter1.Simple pitch gauge to set main blade angles on your RC helicopter2.Be suitable for most blade sizes in the range 400-600 series- e.g. Esky HB king 2- Belt-CP- CP2 Eflite Blade 400 Walkera 22 36 60 etc.3.Along with blade tracking and balancing- correct pitch will ensure good lift and keep your helicopter running sweetly4.Automatic spring slide clip attaches to blade leaving hands free to make adjustmentsPackage Include:1 x Pitch Gauge