Precision Engineered Design:For 4.25" Wet、2" Wet options,our core drill bit is designed with universal 1-1/4"-7 thread.For 2.5" Wet/Dry、4" Wet/Dry、1" Wet、4.25" Wet/Dry、1-1/4" Wet options,our core drill bit is designed with universal 5/8"-11...
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