Intel SE7221BK1 User Manual page 6

Preface
strap attached to chassis groundany unpainted metal surfaceon your
server when handling parts.
ESD and Handling Boards: Always handle boards carefully. They can be
extremely sensitive to ESD. Hold boards only by their edges. After removing
a board from its protective wrapper or from the server, place the board
component side up on a grounded, static free surface. Use a conductive foam
pad if available (not the board wrapper). Do not slide board over any surface.
Installing or Removing Jumpers: A jumper is a small plastic encased
conductor that slips over two jumper pins. Some jumpers have a small tab on
top that you can grip with your fingertips or with a pair of fine needle nosed
pliers. If your jumpers do not have such a tab, take care when using needle
nosed pliers to remove or install a jumper; grip the narrow sides of the
jumper with the pliers, never the wide sides. Gripping the wide sides can
damage the contacts inside the jumper, causing intermittent problems with
the function controlled by that jumper. Take care to grip with, but not
squeeze, the pliers or other tool you use to remove a jumper, or you may
bend or break the pins on the board.
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Intel® Entry Server Board SE7221BK1-E User Guide