Made of heavy pressed steel, swivel rig with double ball bearing in the swivel head, swivel head seals. The special Blickle dynamic riveting process of the swivel head results in minimal swivel head play and smooth rolling characteristics with an increased service life achieved by the work hardening of the ball race grooves. Bolted wheel axle. Zinc-plated, blue-passivated, Cr6-free. Made of high-quality elastic solid rubber, in smooth rolling quality “Blickle EasyRoll”, very high operational comfort, low-noise operation, low rolling resistance, very good floor preservation, vulcanised on the wheel center.