1) Heavy-duty construction 2) Designed for ceiling heights from 7’11” to 10’1" 3) When attic stairs door opened side springs drop along with it allowing wider unhindered access to the attic opening 4) Intelligently designed mounting brackets allow 1½” height adjustment after installation and trimming bottom of ladder legs 5) Specially designed ladder section hinges for maximum safety and long life 6) Patented double hinge system greatly improves safety, stability, and durability 7) Adjustable springs limit door drop distance when locking latch is released 8) Anti-slip grooves on surface of each step for your safety 9) Custom ladder end caps to prevent floor scratches 10) Two (2) year 100% warranty 11) Complete and clear installation instructions included 12) Fully assembled units – very easy installation process