All Patented TruFire X-Caliper heads shown offer features only found with Tru-Fire technology. These are the finest non-Tru-Rotating calipers on the market. Starting with our heat-treated and Teflon coated trigger and jaws for years of dependability. Our user-friendly trigger fires by either pulling or relaxing the trigger. All TruFire X-Calipers come with high strength, ultra-wide, no gap jaws for quicker loading and triggers that are adjustable for trigger pressure. The whole X-Caliper line (except for Patriots) has been redesigned for easier use on string loops. The jaws are now shorter in length and thinner in width. We have also redesigned the trigger mechanism. This change to the trigger has made all of the X-Calipers 80% more sensitive than years past. The X-Caliper only takes 4 ounces of pressure to fire a 70 pound bow. All TruFire Releases are 100% American made.