IDEAL Nailbiter 3 4 in Woodboring Ship Auger Drill Bit Workstation Sinks roof sand grit and other debris Power That Organizes Your roof sand grit and other debris from your gutter so you will never have to climb up a ladder again to clean your gutters 3 Glasses Features Fog free lenses even through nail embedded lumber Dual induction heat treated ensures durability staying sharper longer Heavy duty lead screw designed for quick gripping and penetration power Re sharp enable for extended tool life 7 16 In hex shank length 18 in Quick change shank design Full black oxide coating prevents rust Nailbiter premium dual helix construction Twin cutting edges for fast and smooth drilling