410 Stainless Steel Hex Washer TEK Screws – 390pcs Self-Drilling Set Sandpaper Abrasives such as spanners

such as spanners

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enabling smooth operation in high-speed

Prevents water leakage

410 Stainless Steel Hex Washer TEK Screws – 390pcs Self-Drilling Set Sandpaper Abrasives such as spanners410 Stainless Steel Hex Washer Head TEK Screws 390 Piece Self Drilling Assortment Metal roofing, HVAC ductwork, and structural metal framing all share one common frustration: stopping to pre drill pilot holes slows everything down. These 410 stainless steel TEK screws eliminate that step the self drilling tip bores through metal on contact, so you drive and fasten in a single motion with a standard hex driver. The hex washer head design distributes