Review on TCH Hardware Steel Butterfly Keeper by Ali Mitchell

These are good solid latches (but they don't have a hex handle or 'TCH' engraved on the handle). You have almost 1/8 inch freedom when installing. The latches have only TWO holes (not three) and are spaced 3/4' (19mm) apart in "vertical" orientation. Latches) have holes spaced 15/16 inches (24mm) apart in a "horizontal" orientation. To attach, rotate the latch to the closed position and place so that its "hook" just touches the bracket's "hook", for example: KEEPER ___)(▀▀▀▀▀▀ LATCH. Then, after installation , With the "hook” engaged and the latch closed, the spring is slightly compressed and provides a snug fit. This method places the latch holes and the first latch hole approximately 30 mm (1-3/16 inch) apart . This distance is indicated as 27mm in the top left corner of the engineering drawing. If you use 1/8" fasteners in 3/16" (5mm) holes, the two parts will each shrink about 1/16" , when you tighten the latch, resulting in a 1/8" reduction in clearance (3mm) to a net clearance of 27mm! (If unsure, just mount on a piece of wood and as shown on the drawing indicated, "adjust the sp Note by increasing/decreasing the mounting distance. ") For a given spacing, wider fasteners make for a tighter latch. (I think she said Do something like that...) These two pieces are designed to be installed on the same plane. If you put them at an angle mount, with the latch perpendicular to the latch, you will need to modify the latch, possibly orienting its hook 90º, I've seen others that have a slot in the holder to allow this without modification (example: this article) , where you flip the holder over and put the hook over the edge to allow the locking hook to hook into the slot.If you intend to use them frequently or they are in harsh environments I would suggest adding some lube to the cam mechanism to help them free up can rotate.