PetSafe Easy Walk No-Pull Dog Harness - Ultimate Harness to Help Stop Pulling - Pull-Free Walks - Take Control & Teach Better Leash Manners - Patented Martingale Loop Design - Apple Green,Medium/Large

This is what I use with my strong pullers. If your leash has a big enough clasp, you can hook through the front of the harness and the loop on the collar at the same time. Much better control. https://www.amazon.com/dp/B00Z9I9702?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4&th=1