Our Brick Hook anchors are used to hold onto the shell, the light weight insulating bricks, which are alumina and silica based, the anchors for this product family are made in nickel chromium steel alloy Inconel 601, Inconel 600, Inconel 800, Inconel 800H, Inconel 800HT, Inconel 625, Inconel 602CA, SS 310, SS 316, SS 304, SS 330, 253MA, nickel chromium steel, and any other grades. Their shape has been designed to allow the various ways of anchoring these bricks.