The nautilus evo bicep curl is an high quality piece of fitness equipment that will provide you with a really efficient workout for the arms and upper body the main focus of this machine is to strengthen and mould you upper body with its raised arm movement that maximises the muscle contraction the main feature of this machine is the outstanding strength curve technology with 4 bar linkage system and a weight stack that can be adjusted in 5lb increments produced using 2 x 4 steel frame and ha