The PCK Locking Screw Clamp is a versatile, multipurpose lifting, turning, and pulling clamp capable of lift and turn operations from the horizontal through 180° arc. The clamp can also be used for the assembling of steel plates, structural members and welded sections. The clamp is generally used in pairs for the purpose of drawing two plates or members together or to a predetermined position adjacent to each other. The adjusting screw is used to accommodate various thicknesses of material and to facilitate the attachment of the clamp to the member being worked on.