Some keys are stored in special safes on board which are secured by combination locks. In 1984, Racal bought Chubb, a security company that manufactured safes and locks. Behind the main building is a subsidiary building which houses bank offices, safes, and vaults. While these keypads can be used on safes and vaults, this practice is uncommon. Candidates are also taught how to pick locks on cars, doors, and safes. There are chaise lounges, couches, and day beds featuring private safes. Banks demanded more protection and safe makers responded by designing larger, heavier safes. Other products include fishing rods and reels, gun safes, sport bows, knives and bicycles. Some high-security safes use a glass relocker. Hughes was storing the E-2 Hawkeye data recorders in classified safes. The Estates Company also built large reinforced concrete warehouses, known as Safes. Then the insurance companies force banks to invest in enhanced safes, which can withstand nitroglycerin. He had started robbing butcher shops and used explosives to blow their safes. The company's products were pie safes and kitchen tables. In America, pie safes and food safes were in use in the days before refrigeration.