If you're looking to save money on home improvement tools, there are a few ways to get started. First, check the email for harbor freight coupons. You might get one that offers a unique $20 off $100 coupon; they also send out weekly ads with 20% off coupons. Another way to save is by using the harbor freight promo code discount. If you're a member or a friend of a member, you can save at least 20% on tons of electronic tools in the general sale section.