Keyguard for the Acer Chromebook Spin 511 US English version.

No attachment method is provided with this keyguard.  You'll need to attach it yourself with something like double-sided tape, Velcro, or mounting putty (Blu Tack, etc.)

The default material is 3/16" clear acrylic.  1/8" thick materials are available for users who require the openings to be shallower. There are also a number of 1/4" thick materials available.