This is a well made, heavy faceplate. At 7/16" thick, it is rigid and well balanced. 7/16" Thick Steel Faceplate - Heavy and Rigid 8 Screwholes on 2 guide rings for easy centering Flat spots cut on back spigot for easy removal from lathe 46mm Flat spots cut on back spigot for easy removal from lathe (Use or Maxwood 46mm wrench) 40mm total thickness Brand recognition - is a brand you can count on for quality!