The online consumer reviews for Marks security door locks are mostly positive and receive a four-star rating out five on Amazon.com, as of November 2015; the top-rated Marks locks include the Marks Heavy-Duty Double-Cylinder and the Marks Survival Entry Cylindrical Lever Lock with conventional cylinder. The locks range in price from around $80 to $150.
Marks USA has been a trusted brand in the door hardware industry since 1977, providing various locks including mortise, cylindrical and deadbolt, which are made in the United States. The Marks security door locks are made for residential, institutional and commercial applications and are available for purchase from many retailers and online from websites, such as Sears.com and Amazon.com. The online reviews cite the price, quality and ease of installation as reasons for the positive rating.
Although the Marks security door locks have positive reviews, Consumer Reports' review of the best door locks does not include Marks as one of the mentioned brands. The reviews include testing locks against possible break-ins by force or by using a drill. Most locks, due to inadequate parts or ease of drilling out the cylinders, did not receive a recommendation from Consumer Reports, although Marks lock sets are not directly named in the report.