I just shot a velvet 4 point with a easton tracer, they work great, super useful when trackin. theyer a ton brighter than i expected them to be. surely wourth the money. they also allow you to "trace" the flight of your arrow extremely well, especially in low light. the magnet is easy to mount on the front or back of your bow, and activates the nock up to an inch away. i would reccomend using extra adhesive on the velcrow, which will come off. double-sided tape works for me. anyway theyre just plain fun to shoot!