["TREAD PATTERN GRIP: As your hands sweat throughout a workout the Slam Balls high-quality tread-patterned rubber shell ensures a steady slip-resistant grip. The outer shell also includes the Titan logo and weight indication molded into the ball printed in white." HOME GARAGE GYM ACCESSORY: Utilize this ball for overhead lunges ball slams push-ups Russian twists squat throws thrusters air squats sit-ups and more! It is a great muscle toner and strengthener and you will love how it improves your athletic life. WORKOUT ABS ARMS AND MORE: Incorporating a slam ball into your workout allows you to optimize your forearms glutes quads shoulders hamstrings and abdominal muscles. With its easy-to-grip texture you will be amazed at its difference in your workouts. "CHOOSE THE PERFECT WEIGHT: Titan offers the Rubber Tread Slam Ball in several increments ranging from 10 LB to 150 LB. Whether you are just starting and you need a lightweight accessory to get enough reps or you need something big and heavy weve got you covered." DIMENSIONS: This 30 LB Slam Ball provides an overall diameter of 11.5-inches.]