Jetovo 100 Pack 410 Stainless Steel Wafer Head Phillips Self Drilling Screws Sheet Metal Tek Screws Features: 410 stainless steel has high strength and hardness ratings and resists corrosion in mild environments Teks self-tapping screws provide secure fastening with strong holding power without the need to pre-drill. ¡ñ 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. Specifications: Screw Type: Wafer Head, Phillips Drive Material: 410 Stainless Steel ( TIPS: They are stainless 410 Stainless so they are also still magnetic, unlike 300 series stainless which is non-magnetic. ) Screw Length: 1/2" (0.49") Head Diameter: 0.39" Color: Silver tone Package Included: 100pcs #8 x 1/2" Self-Drilling Truss Head Phillips Drive Dovetail Screws Package Quantity: 100 pcs Caution: Small parts, keep away from children and kids!