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Dan A spring loaded automatic plug ejector for hole saws which utilizes a spring 50 which is increasingly compressed while a hole is being drilled. Once the hole is drilled, the spring 50 decompresses and ejects the plug from the hole saw. The amount of spring tension applied to the plug is adjusted by varying the degree to which the spring is compressed.

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Dan you can use 26650,18650 or 3 normal AAA batteries with adapter on this one.Search on BG he have all batterytypes here.

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