What is this kind of security bolt head called, and how can I remove it?

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One of the most popular types of screws is the Brass CSK Slotted Screw A slot is present on the head of the many varieties of slotted csk head screws produced

slot aparati vockice With a low-profile and countersunk head, flat head slotted screws are ideal for applications requiring a strong fastener with a flush mount

slot mascin A Slotted Screwdriver can be used to drive or loosen these screws Slotted Screw Head Image Cross head A Cross Screw Head, or