Save big on your purchase with a Harbor Freight Tools coupon or promo code. The following lists all the latest harborfreight.com Promo Code & Offer Codes for March 2019. Click "Show Code" button, all the Harbor Freight Tools coupon codes will now be displayed, simply copy and paste one into the box at checkout. All of the other deals use bespoke links that dont require a code - simply click the individual deal you're interested in to go straight to it. If you can not find a coupon that applies to your purchase, make sure to subscribe for our newsletter. We will be sure to alert you as soon as a new harborfreight.com promo code is released.