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Full 2" to 7" Range (50.8 - 177.8mm).
Controlled pressure assures positive, adjustable contact
through full range. Operates with any electric drill. Furnished
with 3" long 220 grit stones, see below for other grits.
Adjustable stop collar permits quick selection of two range
settings, from 2" to 4" and from 4" to 7". Stone arms are easily
compressed to eliminate cylinder scratches
