The Builders Edge Surface Block for Dutch lap for installing fixtures after the siding has been applied to the home; for use on Dutch Lap siding . Mounting blocks are durable, maintenance-free, U.V. stabilized and constructed with color molded-through so they won't scratch, flake, or fade. Our patented Snap-On Trim Ring makes installation easy. Available in 24 colors to match your siding manufacturer and a Paintable option to easily match your home. Limited lifetime warranty. Proudly made in the USA!.