Features: Size: 30mm ( 1-3/16" 40mm（1-9/16"),50mm(2"), 65mm(2-9/16"),1x 220mm 8-7/10", 1x center positioning drill bits (110mm 4-5/16"), 1x Screw,1x Key Wrench. Can be used to install openings for air conditioning, range hoods, water pipes, water heaters, smoke pipes, sewers.
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