6pcs countersink set drill bits for drilling holes with screw sizes 5#, 6#, 8#, 10# and 12#. Countersink drill set are easy to use and adjustable for length with hex wrench. 8pcs Standard Wood Plug Cutter Set includes 4 standard plug cutters and 4 four-tooth chamfered cutters.1/4’(wood plug 6mm),3/8’(wood plug 10mm),1/2’(wood plug 13mm),5/8’(wood plug 16mm).
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