The Calk-In is a pre-assembled precision cast calking type machine bolt anchor which can be used in concrete, block, brick or stone. The anchor consists of an antimonial lead alloy calking sleeve and a Zamac alloy internally-threaded expander cone.The easily conformable lead alloy outer sleeve makes these anchors ideal for soft, less dense masonry such as cement blocks and Brick.
Common anchor applications include Windows, Screens, Sliding Doors and Shutters.