.Are you still using inefficient and dangerous fitness equipment? You should choose a safer and more effective arm fitness equipment for yourself! What are the advantages of our generation power? 1.Will not violently rebound and hurt ourselves! 2.Don’t need to worry about the spring will break! 3.The fully enclosed hydraulic cylinder provides you with a stable resistance strength that will not weaken with the passage of time! 4.Can be adjust to different resistance to meet your needs. 5.Adopt unique safe hydraulic adjustment system principle, even if the resistance is changed, the arm opening angle and arm movement will not change, so there is no need to change the arm movement. 6.Fully open arms even with reduced resistance.