OCR Allen Head Socket Hex Grub Screw Stainless Steel M3-M8 Grub Screw Assortment Kit 270PCS High quality stainless steel hex socket grub screw. Durable stainless steel material which serves for a long useing time. 10size grub screws:M3*3,M3*4,M3*6,M4*4M4*6,M5*5,M5*8,M6*6,M6*10,M8*8. Package quantity: 270 pieces. Come with a plastic organizer box for storage.