Graft Concepts (YC S13) is the Swiss Army Knife of iPhone cases

Card slots. A bottle openerPepper spray.Defense against a .50 caliber bullet. Whatever you might need on the go, people are thinking of ways for you to integrate it right into your iPhone case.

But Y Combinator startup Graft Concepts is trying to cover all your basic needs with one case, using a simple latched frame and interchangeable backplates. Named Leverage, the case’s frame alone is meant to be a bumper for the phone and comes with either a plain backplate for $40 or a card holder (which fits about five cards) for $50. Additional backplates range from $7 to $30 based on design and material.

The idea behind Graft Concepts is to offer easy installation and removal, functionality and a complement to the iPhone’s sleek design. Inspired by watch clasps, the metal latch lets you fit the frame around the phone and then click it into place to avoid any damage from snapping or pulling the case. Co-founder Anthony Ko describes the product as “a Swiss army knife” for iPhone cases, because users can switch out backplates to suit their current needs.

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