The Ezdog Checkmate collar is a traditional half-choke collar with limted movement so as to avoid hurting your dog if they move too quickly.If you"re dog moves too quickly or starts to pull, then they will feel the collar tighten up and they should(!) stop pulling as hard.Features:-Stainless steel D-RingSeperate ID tag attachmentMade from soft-touch nylon webbingReflective stitchingAvailable in 3 colours and 3 sizes