180 opening with detent function (up to 90). Hinge snaps in at open and closed positions. Ideal for folding doors in furniture, folding screens, light duty partitions, and similar applications. Removable hinge pin allows for easy installation. Designed for use with solid wood and MDF. Can also install to aluminum frame with AS-CH-75 parts set (sold separately).WARNING: This product can expose you to chemicals including Titanium dioxide, which is known to the State of California to cause cancer. For more information go to www.P65WARNINGs.ca.goWARNING: This product can expose you to chemicals including Toluene, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65WARNINGs.ca.gov.