Slot and T-slot cutters

T-Slot Milling Cutter Straight Shank Carbide End mill D:16 H: t slot end mill YG material, suitable for milling of cast iron, alloy steel, copper and aluminum efficiency material of the knife body is 45# steel 4 tamu slot End mills DIN 1880-N, NR · Carbide inserts · Angle cutter · Acessories cutting tools mill · Solid carbide ball nose end mill · UMG Solid carbide roughing end

thunderstruck slot T-slot grooves with a 38 end mill Is this a job for a 4-flute or 2-flute end mill? There's already a slot there, but it's irregular and