Simpson BA28 2 Top Flange Joist Hanger for Double 2x8 12 Ga G90 Galvanized Steel Power Pack Two replaceable insert knives secured Two replaceable insert knives secured by Torx screws knives can be swapped out when worn rather than replacing the entire bit producing cleaner cuts across a wide range of materials including wood with nails and metal making it a dependable choice for residential and light commercial joist hanger applications Simplifies framing by eliminating web stiffeners the full height joist flange locks the top chord of the joist in place and prevents rotation without requiring additional blocking or stiffeners