Update: Designed an improved version, following a link
https://www.printables.com/model/527510-festool-built-in-thread-splinter-guard-sp-ts-55-r-
Fixing knob is here https://www.printables.com/model/384802-festool-bolt-knob
Printer brand: Flying Bear
Printer: Ghost6
Rafts: No
Supports: Yes
Resolution: 0.2
Infill: 100%
Filament brand: Esun
Filament color: light blue (PLA+), yellow (ABS+)
Filament material: PLA+; ABS+
Slicer: Ultimaker Cura 5.2.1
Printing temperature: 215 Celsium — PLA+, 250 Celsium — ABS+
Build plate: 60 Celsium PLA+, 100 Celsium — ABS+
Print speed: 60 mm/s
Fan speed 100%
Postprinting: The thread may be needs to be "driven" by a metal screw with lubricant, as the hole is slightly deformed when printing in the radial direction.
The author marked this model as their own original creation.