it's worth the price, but it has flaws:
- the axis of symmetry of the drill moves by 1.8mm next to the axis of symmetry of the clamped pipe, (3 pieces of 1.5-2 mm thick washers are needed under the screws, and everything is OK)
- this can only be used comfortably in the range of 0-45 degrees (I have already tried this)
- be careful! in the range above 45 degrees, the end of the pipe goes higher and higher, and the milling head will barely fit above it