plurality of prongs configured to expand and retain a substrate when engaged by a threaded rod pin and the other end is a partially threaded opening configured to engage the threaded rod pin the threaded rod pin has a section of exterior threading that will engage with both the coupler and the anchor a drill depth measuring guide having a hollow threaded holder to accept a dill bit the holder has a setscrew to secure it to the drill bit and an exterior threaded cylinder to matingly engage a locking nut and a collar that can be threaded onto the holder at various locations to allow for different drill depths application_number US 201514853268 A description preferred embodiments of the present invention and their advantages may be understood by referring to figs 1 6 wherein like reference numerals refer to like elements with reference to fig1 2 the anchoring apparatus 1 has a generally cylindrical anchor 2 having a first end 3 and a second end 4 the first end 3 of the anchor 2 has a plurality of prongs 5 in an embodiment the prongs 5 are formed by a plurality of longitudinal cuts in the first end of the anchor 1 wherein a distal end of the prongs 5 is at the first end 3 in one embodiment each of the prongs 5 have a.