Kwik Lok web site: http://www.kwiklok.com/

(taken from their site)

We are the manufacturer of the all-plastic bag closure. Kwik Lok is to the plastic bag what the screw top cap is to bottled beverages. A modern closure that provides the consumer with an easy to open and easy to reclose package. Kwik Lok also offers an efficient and effective method to print price, freshness dating, lot codes on the bagged package. Information printed on the Kwik Lok is easy to find and easy to read by consumers. They appreciate it!

Kwik Lok 865

The KwikLok bag closers will close any package width without adjustments. Package width limitations are determined by the closure opening, not the gearing of the machine. The KwikLok closers will adapt to most automatic bagging operations on the market.