I have had both, the wrap around slide around and don't stay in place like the bolt ons do. I like the bolt ons best I drill a hole thru the roll bar cross bar behind the seat and bolt both shoulder harness to that location Make sure your crossbar meets NHRA specs in realation to your shoulders when sitting in the seat first , if that is a concern at your local tracks The harness attaching point is suppose to be no lower than 6 inches below your shoulder, if I remember correctly, check the rule book to make sure what the exact spes. are