LOVIT Quality Arm Blaster 4mm Neoprene Padded for Body Building, Bicep Curl Triceps Muscle Builder, Bicep Blaster, Biceps Arm Blaster by TOP QUALITY BICEPS ISOLATOR: Keeps the back and elbows locked in curling position. Arm Blaster designed to isolate arms and shoulders THICK 4mm STRONG ALUMINUM BODY: Thick gauge aluminum. THICK 5mm NEOPRENE NECK PAD: foam neck padding. ADJUSTABLE BELT: webbed nylon belt Comes with neck strap and Buckle for Clip keeps Belt Secure. ONE SIZE FITS ALL - 100% MONEY BACK GUARANTEE