https://www.amazon.com/gp/slredirect/picassoRedirect.html/ref=pa_sp_phone_search_mtf_aps_sr_pg1_1?ie=UTF8&adId=A100691321Z9QSMYH7DVK&qualifier=1678157638&id=5394052826075314&widgetName=sp_phone_search_mtf&url=%2FInvisible-Adjuster-Loose-Jewelry-Polishing%2Fdp%2FB07WK2NNR6%2Fref%3Dmp_s_a_1_6_sspa%3Fcrid%3DUU4D4SGB7K8O%26keywords%3Dring%2Bresizer%2Bfor%2Bloose%2Brings%26qid%3D1678157638%26sprefix%3Dring%2Bresixer%252Caps%252C77%26sr%3D8-6-spons%26psc%3D1

https://www.amazon.com/Adjuster-Measuring-Invisible-Tightener-Polishing/dp/B0B1GYMYNW/ref=mp_s_a_1_9?crid=UU4D4SGB7K8O&keywords=ring+resizer+for+loose+rings&qid=1678157638&sprefix=ring+resixer%2Caps%2C77&sr=8-9

So the plastic skinny looking things in the first pic I feel like work to make it tighter better than the coils. Also the second link has the long skinny things and different thickness of coils I feel like the thicker coils make it tighter as well as the ones in your picture seem small