Abstract: A versatile clamp which consists, at least in part, of at least one extendable arm, one fixed-length arm, pivotable clamping legs on the distal ends of the fixed-length arm and extendable arm, and locking means; wherein clamp adjustments, by the user, to the extendable arm and pivotable legs are retained by a locking action, which, prevents an inadvertent change of the extendable arm's effective length and the clamping legs' angular orientation from their set positions. The combination of a variable-length extendable arm and variable angular positioning of the legs enable a single versatile clamp to be used in a variety of clamping configurations. The versatile clamp may be easily made, without the use of any tools, to clamp onto thick and thin materials, alike, and to perform in applications which require an offset clamping operation. The versatile clamp may also feature one or more interchangeable clamping arm extensions and legs.