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Taskstar via Amazon has TaskStar 12,000 PSI Grease Gun Coupler w/ Quick-Release Design & 6-Jaw Locking Tip (‎GR02) on sale for $17.95 – Extra $4.67 Off coupon found on product page – $7.18 off when you apply promo code 6AVNMGVT on the checkout page = $6.10. Shipping is free w/ Prime or on $35+ orders.