Both featured riveted and welded construction. The hull was entirely riveted, but all other joints were welded. Malcolm Sayer retained the original tub with lighter outer panels riveted and glued to it. The parts were then riveted or spot welded together. The cars were largely riveted aluminium, with steel underframes. The "flat bladed" screwdriver was another design composed of drop-forged steel with riveted wood handles. Until the mid-1900s, steel sheets were riveted together. Later boilers were made of small wrought iron plates riveted together. Rose is shown wielding a walking stick made from riveted aircraft aluminum. At the same time, road wheels' rims were riveted instead of bolted. Older tanks, however, are often riveted or bolted, and are not vapor tight. The stress bearing skin was riveted to spars and ribs. Sometimes slaves had a metal collar riveted around the neck. The fuselage was formed of stringers to which the fuselage skin was riveted. The handles are usually riveted in place.