How is metal stitching done?

How is metal stitching done?
Groups of holes are drilled across the line of fracture to the tool depth of the casting. The holes are then joined to conform to the shape of the Metalock Keys. The keys are inserted in the apertures. Holes are then drilled along the line of the fracture.
>Cold repair method, causes no distortion in workpiece.
>Full strength can be restored.
>Expensive re-machining requirements are low.
>Inherent stress in casting is relieved.
>Dismantling is rarely necessary.
>Provides Co-efficient of expansion in relation to repaired metals.
>Gas/Liquid proof repair.
>Withstand with high temperature and pressure.
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