Measure a device pocket before ordering
Compare the opening, depth and access to controls.
Measure the part that has to fit
For a wand pocket, compare both opening diameters and the usable depth against the part of your device that passes through the opening. Overall handle length alone does not answer either question.
Keep the controls reachable
Check that the device can be stopped promptly and removed without forcing the fit. Make sure the support does not cover controls or vents the manual says to leave clear.
Confirm the named model
For a device-specific mount, match the name and version on the box. See the wand head and grip guide for the device measurements to check first.