Hello everyone I am wondering on what is the best way to gain size in arms. Bi tri and forearms. I can't do pull ups even tho I've herd they work good for the biceps. I also can't do much for triceps. I don't have a gym membership so all I got Is a flat bench, straight bar, curling bar, preacher curl machine, leg extension machine and couple dumbbells and the perfect pushup thing. My legs are pretty big so I'm going onto my upper body now. I'm kind of struggling with my arms so please help. And also if this helps I bench at about 160lbs and curl 40lbs one rep Max on dumbbells.