my new projector Benq ht 5550 has 4 holes in a square for a ceiling mount, the picture only shows 3 holes in a triangle is the picture right???

The actual mounting plate may differ from the picture.

Questions & Answers: Projector Ceiling Mounts Direct, LLC. - BENQ-HT5550-MM - Projector Mount Compatible with BenQ Prime Cinema HT5550 Home CinePrime W5700 W5700S Projector Models

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Projector Ceiling Mounts Direct, LLC. - BENQ-HT5550-MM - Projector Mount Compatible with BenQ Prime Cinema HT5550 Home CinePrime W5700 W5700S Projector Models

Built to Last
100% Aircraft Aluminum (6061-T6) Construction
Easy to Install
All the necessary hardware included. Detailed instructions for easy and quick installation.
Extension Length
Sets the projector approximately 5 inches away from the ceiling
Perfect Fit
This mount is designed to fit the projector models listed in the title only. If your projector make and model is not listed, this mount may not fit. The projector plate you receive may not resemble the plate shown in the picture(s), but it will fit the projector models listed here.
Compatible Projector Models
BenQ Prime Cinema HT5550 Home CinePrime W5700 W5700S

$59^.95 –