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A loose installation bolt can be dangerous. Always check to see they are tightened securely. Adjusting depth of cut Depth of cut may be adjusted by simply turning the knob on the front of the tool. Knob Adjusting front base The front base is factory-adjusted to allow concave cuts with a radius of 320 mm. For concave cuts with the tool’s minimum radius of 300 mm, loosen the wing bolt on either side and raise the front base as far as it will go. Then retighten the two wing bolts firmly to secure t