I switched to a loop even before PSE and other companies began to offer them pre cut. I'll never go back. There is very little to no wear on the string, no torque on the string at full draw, and no nock pinch below the nock, the nock is centered directly in front of the release. Also when tuning you don't have to remove the nocking ring every time you need to move it, just simply twist the loop around the string and it will move up or down the serving just like a screw. They are lighter than the brass nocks also. The only draw back is that it does shorten the draw length of the bow about 1/2", but the advantages (IMO) far outweigh that. Don't use the metal loops out there, they are noisy and heavy, and that's just two more screws you have to wory about coming loose.