X2 Fast Drill - Fast drilling in all conditions.
X3 Fast Bore Enlargement - A unique solution for bore enlargement.
X4 Fast Plug Removal - East plug removal in one click.
NOTE: All hole saws require an interchangeable Fast Lock™ center drill that allows changing between sizes in seconds without tools. Order center bit is determined by the size diameter of the hole saw.
551-HS1 is for 5/8" to 1-3/16" Diameter saws
551-HS2 is for 1-1/4" to 6" Diameter saws

Series 551, Bimetal PLUS 8% Cobalt Hole Saws
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