• Time-saving tool to produce professional, precise drilling & counter-sinking results
• Seven of the most-used sizes: 1/8" to 7/32" (2.8mm - 5.8mm); 3/8" countersink diameter
• Tapered 3-flute bits help preserve thread-holding power of wood
• Each bit has dual-adjustable depth collar system; set depth of hole plus depth of countersink
• High speed steel bits with carbon steel collars for long-life durability without brittleness

Bit sizes: 1/8"/2.8mm, 9/64"/3.3mm, 5/32"/3.8mm, 11/64"/4.3mm, 3/16"/4.8mm, 13/64"/5.3mm and 7/32"/5.8mm. One-year warranty and Jack's Tool Shed worry-free Satisfaction Guarantee.