Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Position of locked and unlocked screws within the baseplate for each configuration. 1a Baseplate with four locked screws, 2a baseplate with three locked and one unlocked screw, 3a baseplate with two locked and two unlocked screws, 4a baseplate with one locked and three unlocked screws. L locked, U unlocked
