The idea behind these ferrules is to combine two ferrules into one: a pocket hole ferrule and a face hole ferrule. Unfortunately, the design of this clip makes it less useful than any other clip it can replace. One of the main problems is insufficient jaw opening. Unlike the two clamps this product is attempting to replace, the jaws do not open wide enough for 1.5 inches (2 x nominal) of material. They are only designed for clamping thin sheet metal materials. Another issue is attaching the clamp pin/surface with a thumbscrew, it's just awkward and difficult to attach securely. The rotating pin/end piece introduces play into the clip compared to a traditional pocket hole or end clip. It's difficult to get perfect 90 degree angles with pocket holes with this clip, and it tends to move around as you turn the screws. The end clamp side works well but I find its use limited due to the narrow jaw opening.
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