Ghostop offers the ultimate Zero Clearance Solution™, providing a discreet door stop designed for hinged, pivot, and sliding doors Ghostop remains discreet and nearly invisible, featuring a distinctive mechanism that employs a retractable pin powered by a rare-earth magnet that extends to engage with a strike plate as its approaching it, ensuring a secure and reliable hold Ghostop provides a flush-to-the-floor door stop for lighter swing and pivot doors on any floor surface with no clearance required Pairs nicely with our Tectus Hinges or FritsJurgens Pivot Sets Maintenance-free The design includes a special graduated recess called the Delrin® ramp, which hides a powerful neodymium magnet for effective performance. Rectangular strike plate in stainless steel and brass Series 316 marine-grade stainless steel spring Delrin® pin assembly and strike Spring-loaded high-density Delrin® pin Maximum door undercut/jamb gap: .75" A Delrin pin is a type of pin made from Delrin, a versatile engineering thermoplastic known as POM-H (homopolymer acetal). Delrin is used in various applications due to its high strength, low friction, and excellent dimensional stability. It is commonly used in industries such as automotive, aerospace, and consumer electronics for creating precise components like gears, bearings, and housings. Delrin pins are particularly valued for their ability to withstand extreme temperatures and resist wear and fatigue, making them ideal for high-performance applications INSTALLATION Install Pin Assembly along bottom of door at the desired location, ~3/4 the distance to the latch side. Pin Assembly bore must be thoroughly cleaned out to ensure proper operation. Install strike plate in jamb, or other surface, the ramp centered with pin assembly. Align the strike plate ramp with the pin assembly on the door swing prior to fixing the cover plate screw