Welded cutting edge for extreme life in tough materials, including nail-embedded woodReplaceable screw-point tip is larger and more durable and pulls bit fast for clean, true holes*7/16" hex impact shank reduces slipping in standard chucks and is compatible with all 7/16" impact wrench chucksSpecificationsItem #DiameterShank SizeOverall Length18693811"7/16"5"18693821-1/8"7/16"5"18693841-1/4"7/16"5"18693861-1/2"7/16"5"18693871-3/4"7/16"5"18693882"7/16"5"18693892-1/8"7/16"5"18693902-1/4"7/16"5"18693912-9/16"7/16"5"18693923"7/16"5-3/8"18693933-5/8"7/16"5-3/8"18693944-5/8"7/16"5-3/8"