New price low. Amazon with TaskStar has the TaskStar 12000PSI 6-Jaw Clamping Grease Gun Coupler for $17.96 - 38% off with coupon code BPLI3NHS at checkout = $6.47 with free shipping on $35+ or with Prime.

Amazon promo codes don’t always work on the first attempt. Try refreshing the page and re-entering the code.