Handle can be installed from both front and back Cap hides screw heads for clean appearance (option) 3 colors available Rounded inside allows for easy gripping Caps are tightly fixed to prevent from falling off Possible to customise cap color from 3,000 pcs MJH-150 is compliant with SEMI standard (SEMI S8-0308)WARNING: This product can expose you to chemicals including carbon black, which is known to the State of California to cause cancer. For more information go to www.P65WARNINGs.ca.gov.