Wheel clamp
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A wheel clamp, also known as wheel boot, parking boot, or Denver boot, is a device that is designed to prevent motor vehicles from being moved. In its most common form, it consists of a clamp that surrounds a vehicle wheel, designed to prevent removal of both itself and the wheel.
A modern wheel clamp placed on a BMW E60 5 Series for a parking violation in Melbourne by the Victorian Sheriff; note the tire spikes and panel preventing the vehicle being driven or the wheel being removed
Wheel clamp as used by the Los Angeles Department of Transportation
An early wheel clamp device offering a $100 reward for arrest of tamperers, mounted on a 1920 Hudson
Several vehicles wheel-clamped at University of North Texas, Denton, Texas
Angle grinder
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An angle grinder, also known as a side grinder or disc grinder, is a handheld power tool used for grinding and polishing. Although developed originally as tools for rigid abrasive discs, the availability of an interchangeable power source has encouraged their use with a wide variety of cutters and attachments.
Angle grinder