Smith & Wesson Model 100L 4-Link Chained Handcuffs

CopsPlus

Silver metal finish matches exactly, Chain link design matches, specifically the 4-link detail is consistent with the frame, Double-lock mechanism visible and consistent, Overall form factor, dimensions, and material (steel) align perfectly, Brand (Smith & Wesson) is a highly plausible manufacturer for such an item, even if not visible

Smith & Wesson Model 100 Handcuffs

The Public Safety Store

Silver metallic color matches, Chain link design matches, Standard professional handcuff form factor and dimensions match, Material appears to be metal, consistent with the source, Reputable brand for this product type

Ace Martial Arts Supply Professional Handcuffs

SparringGearSet.com

Silver metallic color matches, Chain link design matches, Standard handcuff form factor and dimensions match, Material appears to be metal, consistent with the source