The York commercial rubber hex dumbbells (2 x 7.5kg) feature rubber hex shaped ends to diminish the noise and ensure protection for the floors and surrounding equipment. The dumbbells come with torque threaded heads that are permanently attached to a thick (35mm) firm steel shaft to improve the strength of the head/handle joint. They have knurled chrome handles to ensure a comfortable and secure grip, while their anti-roll design helps prevent the dumbbells from rolling away. In addition, the dumbbells are suitable for light commercial usage only.