There's more room inside: LOCKDOWN stretches to fit any size guy, even the Hüj ones. The sling-style base keeps it on--the ball-ring is more substantial so it stays in place.
More "headroom" will drive you nuts--more room means the head gets more sensation, more friction-frustration, but you can't do anything about it. The curve in the shaft makes erections less comfortable, but keeps chastity possible under clothing, 24/7, with more bulge but still discreet.
LOCKDOWN does give a frustrating meaty bulge while it locks down your cravings and ability to use your dick...one of the few toys hünkyjunk designed to deny your pleasure.