Square section aids removal of extractor from screws. Repellat cum officiis aspernatur numquam minus quaerat?. Contents: #1; 1/8"(3mm), #2; 3/16"(5mm), #3;15/64"(6mm), #4; 5/16"(8mm), #5; 3/8"(9mm). We make sure to keep our prices competitive by buying in bulk and keeping the overheads low.