With the Spax Spax-RA frame anchor, you secure window and door frames quickly, solidly, and stress-free directly into masonry or concrete. Because no wall plugs are needed and the full thread prevents frame distortion, you achieve a stable and precise installation every time. The compact cylindrical head countersinks neatly into the profile for an unobtrusive finish. Thanks to the t-star plus T30 drive, you benefit from optimal torque transfer without cam-out while driving this 7.5 x 180 mm steel screw. The advanced wirox surface coating delivers dependable corrosion protection, keeping your heavy-duty fixings firmly anchored for the long term.