●◆ High-quality 410 Stainless Steel Self Drilling Screws Assortment Kit ●◆ Material: 410 Stainless Steel; Screw Type: Pan Head, Phillips Drive ●◆ Packing Quantity: 240pcs, Packed in A Rugged Convenient Re-sealable Plastic Storage Case. ●◆ The Package Contains 6 Sizes, Included: #8 x 1/2, #8 x 5/8, #8 x 3/4, #8 x 1, #8 x 1-1/4, #8 x 1-1/2; ●◆ Self-Drilling screws. It is wood drill tail screw, mainly used in steel structure caigang watt fixed can also be used for fixing the simple construction of the sheet material.