Breaking a digging fork can render it pretty useless but it can easily be given a new lease of life by replacing the shaft and handle. A variety of different types of shafts and handles are available from garden centres or online.
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Clamp the steel digging fork into a vice on its side so that the metal studs are visible and accessible. If it is fixed by screws, unscrew them
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Once the studs have been removed the broken fibreglass or wooden shaft can be released from the fork
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If the shaft is stuck in the fork, drill a hole through the shaft and and push a cross headed screwdriver through the shaft
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If the shaft is stuck in the fork, drill a hole through the shaft and and push a cross headed screwdriver through the shaft
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Clamp the digging fork into a clamp and fit the shaft and handle onto the fork using a wooden mallet. Make sure the handle is aligned with the fork properly
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The metal tines can be straightened out by placing the bent tines into a strong metal pipe clamped into a vice. Use as a lever to straighten up.