The SnapBack is the worlds only releasable chalk line, it snaps back so you don't walk back! The fanged tip grips the work surface, locking in place until you release it. A durable fat body design ergonomically crafted to fit your hand, non-slip rubber grips, planetary gear system, built-in belt clip and more make it a game changer. Save half the steps by never crossing a workspace again to retrieve a chalk line tip.