ATD Tools 9200 Step Drill Bit Set 5 pc.

Perfect for drilling holes in thin mild steel aluminum copper brass plexiglass wood and laminates Two flutes design for true round holes and automatically deburrs as you drill Tri-flat shank design for sure grip in chuck without slippage SET INCLUDES: 1/4 Shank: 3/16 to 1/2 holes in 1/16 steps 1/4 Shank: 1/8 to 1/2 holes in 1/32 steps 3/8 Shank: 1/4 to 3/4 holes in 1/16 steps 3/8 Shank: 3/16 to 7/8 holes in 1/16 steps 3/8 Shank: 1/4 to 1-3/8 holes in 1/8 steps