this mount have a solid adjustment mechanism for easy aim and , just as importantly , easy lock so it stay put after adjustment . I want a mount that keep the projector very close to the ceiling , and this be quite low profile . the mount arm be solid and easily adjustable , and it come with very large lag bolt to go into you ceiling , make it easy to install this securely . the most pleasant surprise be the plastic cover over the ceiling plate and projector screw , so the finish product be quite attractive too .