5/8 x 6-In. Silver & Deming High-Speed Black Oxide Drill Bit Brand_Reese The 3-15/16' hole spacing is

The 3-15/16' hole spacing is designed for use with mortise lock installations using Adams Rite and W&F mortise locks

ticks (including Deer Ticks)

the working time is 3-4 minutes

Instant push-to-connect connections for increased ease of use: No soldering

Lightweight magnesium handles with replaceable blades

5/8 x 6-In. Silver & Deming High-Speed Black Oxide Drill Bit Brand_Reese The 3-15/16' hole spacing isMaster Mechanic, 5 8" x 6", Black Oxide Surface Finish Improves Chip Flow & Increases Abrasion Resistance, Recommended For Drilling Wood, Plastic & Soft Metals, Used In Machine Shops Using Screw Machines Or Where The Maximum Chuck Capacity Is 1 2", Carded.