Hole Saw Door Lock Installation Kit, Features Rip Guard The Strongest Tooth Form In The Industry, Plug Jack An All Access Slot Design For Fast Plug Removal, Bi Metal Construction With 8 Percent Cobalt For Increased Wear Resistance, Includes 1" Hole Dozer Bi-Metal Hole Saw, 2-1/8" Hole Dozer Bi-Metal Hole Saw, Anti-Splinter Depth Stop, Arbor Adapter, Auto Centering Drill Guide, Spacer & Two 3/8" Small Thread Arbor.