Strong and robust, the cast iron dumbbells and chrome spinlock bars are incredibly heavy duty. The spinlock collars make it quick and easy to increase or decrease the weight. Additional Kemket Fitness discs can be purchased separately for extra customisation. Product Features:- • Traditional design with heavy-duty cast iron discs • Strong chrome spinlock bar and rubber-edged anti-slip spinlock collars • Knurled anti-slip hand grip for comfortable lifting • Supplied with a workout chart Weightlifting techniques:- To get the most out of your workout it is essential that you are using the correct weight. As a guide, the last rep should be a struggle. If the dumbbells are too light, simply unscrew the spinlock collar and increase the load slightly by adding another disc. You should still have control over the weight and your form should still be correct - don't arch your back, strain your neck, or rock your body to generate momentum as this can cause injury - but you should feel like you can't lift another rep. Perfecting your breathing techniques when you're working out is also crucial, helping your body to deliver oxygen to your muscles more efficiently. For strength training, exhale on the exertion phase (the lifting, curling or pushing) of the exercise and inhale on the easier phase when you return to the starting position. Proper breathing can also help you to build endurance and ensure good form. Dumbbells can be used to target all areas of the body.