Innovative Exerciser that Lets You Exercise Anywhere Break a sweat anytime, anywhere with the impressive NSD Power Essential Spinner. This hand-held wonder spins at up to 15,000-plus RPM and uses angular momentum to give your arms, hands, wrists and forearms a sweat-inducing workout. Just a few minutes a day with the NSD Spinner can be equivalent to hours of full-motion work with a dumbbell or curl. It provides excellent strength-building benefits to athletes looking to hone their arm and wrist strength. Plus, it’s really fun to operate! The compact, break-resistant design means you can toss it in your bag for strengthening on the go. This hand-held exerciser is easy to operate via an include pull-string. Some models are equipped with an auto-start pre-tensioner plus speed variable multi-colored LED lights for a mesmerizing display. Choose your perfect option, including the ergonomic PB-688 Amber NSD Spinner all the way up to the high-tech and full-featured PB-688AML Spinner with added LED lights powered by an inner generator and other great features. All NSD Spinners are made of Latex-free materials. Make sure to shop only verified, genuine NSD Products to ensure that yours is built with the best quality materials and works with no defects.