It is easiest to think of this as a barrel-shaped insert nut that secures in any 19mm(3/4") diameter hole, except this one self-anchors and is removable. Usable horizontally, vertically or at any angle in between, it accepts common 1/2" UNC threaded bolts, and will wedge in through-holes in material as thin as 16mm(5/8") or in blind holes 32mm deep. With pull-out strength of at least 90kg in hardwood, the anchor has a wedging mechanism controlled by an integral hex-head screw drive and an external rubber O-ring that uses friction to hold it in place during installation. Though any 1/2" UNC threaded rod or bolt may be used with our bench anchor, we offer a small selection of flat-head and round-head fasteners here for convenience. Made in Canada.