This expansion bit is designed for easy, accurate adjustment. The two movable tool-steel cutters are graduated in 16ths. One cutter is used to drill holes from 5/8" to 1-1/8"; the other cutter adjusts from 1" to 1-3/4".
Also useful when you need to drill a hole of an uncommon or in-between size. The long screw point provides ample pulling power to draw the cutter smoothly into the wood.
6-5/8" overall; nominal 3/8" hex shank.
SQUARE SHANK/HEXAGON SHANK/SQUARE-TAPER SHANK/ROUND SHANK are available for your choice.
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