The PCK Locking Screw Clamp is a versatile multipurpose lifting turning pulling clamp capable of lift and turn operations from the horizontal through 180 degrees 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 isused to accommodate various thicknesses of materialand to facilitate the attachment of the clamp to themember being worked on.