Thunder Bolts - Concrete Frame Screws

-Virtually stress free, allowing close to edge applications.
-Torx compatible head screw for increased torque control.
-High load capacity with interlocking thread into base material.
-Through fixing, eliminating the need for marking and re-positioning.
-Widely used for batten, window and door frame fixing.
-Suitable for most masonry subtrates including concrete and brickwork.