How to Adjust the Patio Door Keeper

The patio door keeper must be in the proper position in order for the locking points in the handle to securely fit around it. Viwinco President David Barnes explains the adjustment in this easy-to-follow video.

Founded in 1982, Viwinco Windows designs and manufactures custom-made windows and patio doors for new construction and replacement applications in the residential and commercial markets. Varied product lines are offered, including Viwinco's impact-resistant OceanView line. Styles include double-hung, single-hung, casement, fixed geometric and picture windows, and more. Production occurs in Viwinco's 140,000 square-foot manufacturing facility, which is home to the company's in-house laminating and tempered glass operation. Viwinco is headquartered in Morgantown, PA.

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