SKID-RESISTANT DESIGN. Featuring durable rubber legs that are skid and slip-resistant, calisthenics equipment and portable bar ensures your stability and security during exercise which makes it perfect for high-intensity workouts, cross-training, and calisthenics. MADE OF SUPERIOR MATERIALS. Crafted from durable duralumin material, this exercise equipment bar ensures long-lasting use during workouts. With its exceptional strength, it can withstand even the most intense routines to provide you with the stability for a successful workout session.