Havingtestedsomeoftheirchainsinthepast, I suspectthat's not a hollowclaim.
Fromwhat I canseeontheinsideofthisplastichousing, thereis a hardenedsteeltubecomprisingthemainbody, and I alsodon't seeanyplasticontheinside, whichisalways a verynicesurprise, asonewouldhopethelockingmechanismisnotShimableorbypassableinanywaythat I canseeandthemakerseemstohavepaidspecialattentiontodrillresistancewith a verythickpieceofsteelguardingthecore.
Nowthecoreitselfis a discdetainerdesignsevendiscsplus a spinnerbutnofalsegatesinanyofthosedisks.