Product review (2 stars): Professional used and destroyed in first use
Three rods destroyed on first use.  This particular set was not even a 1/10  as strong as the set I been using for 6 months  on a weekly basis.  BIGBADWOLF VENT CLEANING! yes I am using this as a pro and broke off in a client's  vent. I got it out because  I had my older set which seems alot sturdier than these.