Brand new in the Package! 150Pcs Self Drilling Screws Assortment Kit, 410 Stainless Steel Self Tapping Sheet Metal TEK Screws, #8 1/2" 3/4" #10 1" 1-1/2", Hex Washer Head FEATURES: PACKAGE INCLUDED: Self Drilling Screws Assortment (60Pcs #8 x 1/2", 40Pcs #8 x 3/4", 30Pcs #10 x 1", 20Pcs #10 x 1-1/2" self drilling screws for metal, silver, hex washer head) SELF DRILLING SCREWS: Quick self tapping screws for metal. The drill-bit-shaped tip allows these screws to be used without a pilot hole, saving user time. Used for metal-to-metal or metal-to-wood connections, commonly used in thin metal applications DURABLE 410 STAINLESS STEEL SELF TAPPING SCREWS: Our self tapping screws for metal are made of 410 stainless steel, corrosion resistant, rustproof, high strength, no deformation. 410 is magnetic stainless steel WIDE APPLICATION: Self drilling screws for metal, wood, plastic. Self-drilling screws for metal, include working with metal roofing, HVAC and ductwork, and steel frames. Attaches wood, plastic, and other metal to sheet metal FINE WORKMANSHIP: Self tapping sheet metal screws with hex washer head and external hex drive prevent slippage and ensure a strong hold. Deep and clean threads tighten the connection GREAT ITEM AT A GREAT PRICE!