The Zebra DelGuard introduces a new lead breakage prevention mechanism to the market by absorbing some of the writing pressure within the internals of the pencil. As with all new products on the market that introduce new features, it boils down to does it work as intended. In the case of the DelGuard, it does.
When I first saw the DelGuard I assumed by the similar looks that Zebra was going for a Kuru Toga type mechanism, but that is not the case. Instead, they built in cushioning inside barrel in the form of a spring and lead pipe that adjusts as you write.
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