COMPATIBILITY - Single monitor mount ideal for most screens up to 27' and 13.2lbs with 75x75mm or 100x100mm backside mounting holes. FULL MOTION - Easy height adjustment, rotate 360°, tilt ±80° up and down, swivel ±180° left and right. TWO INSTALL OPTIONS - C-clamp and optional grommet base (fits desk up to 3.85' thickness) save your valuable desk space. METAL BODY - 90% of high grade steel material ensures study life-time use. EASY TO INSTALL- Step-by-step user manual and organized hardware kit for hassle free mounting.