BBlades BSafe Propeller Lock

$79.99; www.bblades.com

Owners of outboard and stern-drive boats can keep their propellers secure with the BBlades BSafe Propeller Lock. The device consists of a recessed, anti-theft locking propnut shielded by a hard-anodized aluminum hydrodynamic cone. The cone secures to the propeller hub assembly with an additional locking mechanism that requires a specially designed key for removal. The cone body shields the sealed locking mechanism as well.