Depending on the size, typically a #1 or #2 square bit will work fine on those.
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Bill K
2018 North Point 377RLBH, Roadmaster Comfort Ride, Dexter E-Z Flex Suspension, Flexair 21k Pinbox, Victron MultiPlus II 2x120v 12v, power distribution, solar controller, smart shunt, 1000w of solar panels, 4 Lifepo4 200ah batteries
2017 Ford F350 Lariat CC DRW LB 6.7, Air Lift 7500XL with Air Lift dual channel wireless
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