Sorry for the late reply Tandem Keys are small spoon like attachments the slip over the tongue of tour trace buckle. They have a hole where you can attach your tandem leader traces. They work great as long as All your hardware tongue keys and snaps are stainless steel. Any other material will be too weak. Jerry _________________________________________________________ To Unsubscribe, change to Digest or Vacation mode go to: http://www.drivingpairs.com/dpmem.html `````````````````````````````````````````````````````````