Bluemoona 200 Pcs - Stainless Steel 304 Allen Head Socket Hex Set Grub Screw Cup M3 M4 M5 M6 M8 With Box Thread x Pitch:M3 x 0.5, M3 x 0.5, M3 x 0.5 M4 x 0.7, M4 x 0.7, M5 x 0.8, M5 x 0.8, M6 x 1, M6 x 1, M8 x 1.25 Length:3mm, 4mm, 6mm, 4mm, 6mm, 5mm, 8mm, 6mm, 10mm, 8mm Quantity:total:200 pcs(Each Size 20 pcs) with plastic box Material: Stainless Steel Used for machinery ,industrial fasteners,Home Improvement,Industrial & Scientific,Home & Kitchen,Sports & Outdoors