A significant part of the price increase is due to..
A. Import cost sanctions
B. Weakening of US $ to the Chinese RMB
C. Cancelation of the TPP (Trans Pacific trade agreement), would have deleted the 9% import duties

The end result was the final product cost to Harbor Freight, landed in USA port shipped from China was increased by 37%. So now after considering the profit markup % by Harbor Freight, the final retail cost was increased significantly..

Just my $0.02.... wink