Hand truck or Trolley handles with knuckle guard.

I advice to give it strength, to print the one with only one knuckle guard laying down, on it side and the one with two knuckle guards on the corners of the knuckle guards standing in triangle from the build plate and up. 
 
 I have used PETG for this and I printed it with the minimum of 6 walls and 50 % infill to give it strength. 


: DISCLAIMER:
 I advice you to make some tests before using them in a work area, where OSHA comes around, as I do not know the true strength of knuckle guards.