Shank/Arbor Hole 3/8″ Arbor Hole 1/4″ Shank 4/5″ Arbor Hole 1/4″ Shank 1/4″ Shank 5/8″ Arbor Hole. 【Easy to use】3/8″ arbor hole fits bench grinder and die grinder, also can fit drill with connecting rods.
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