Professionally packed and shipped. Yes, the 4-48 tip is very tight! Wrap an aluminum or brass sheet around the piston skirt and hold it with pliers while unscrewing the tip with another pair of pliers. Do not hold the indicator body while unscrewing the factory tip. (Why risk internal damage?) The accuracy of the movement I checked with many random stacks of gauge blocks when the pointer was set at the right angle. My unit was within 0.0005" on a 1" stroke. All functions work perfectly. The top of the flask is open with a knurled cap. You can take it and use it to raise/lower the gauge tip (some indicators are sealed on top). Having bought machinist tools made in the USA for decades, I am reluctant to buy Chinese ones. After purchasing and testing, I really appreciate your efforts. My application doesn't need a resolution of 0.0001 inch, so this device is perfect. No disadvantages.
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