LCN 4642 REG 689 Low-energy Power Operator, Push Side Mount, Aluminum, 33.5" Length, 4.375" Width Standard, top jamb (push side) mounted 4642 closer shipped with regular arm, metal cover, and wood and machine screw pack; Actuators available separately Features: Digital Control Suite, On-Board Diagnostics, On-Board Power Supply, Factory-Default Memory, Plug-and-Play Connections, No Destruct Feature, No Guard Rails or Safety Mats required 10,000,000 Cycle Heavy-Duty Door Closer Non-sized cylinders for interior doors to 46 and exterior doors to 36; Non-handed for either right or left swinging door 4642 has easily accessible switches to provide on/off and continuous hold open functions.