Looks like exact copy of original Tamiya aluminium front upright. But is cheaper. I use this item with my Twin Detonator and #TL-001V2BU C-hubs. Also fits to Dual Hunter and Double Blaze trucks. Standard plastic knuckles was cracked. With metal knuckles there is no more cracking, no more dropped-out screws. Can to jump without beeing afraid that knuckles may to break. But there is one imperfection. Big drive shaft play arises. So it is necessary to decrease steering throws to avoid drive shaft dropping out.