Colt 10700412 TwinLand Brad Point Wood Drilling Bits, Metric Set in Plastic Pouch, 7-Piece Exclusive TwinLand design improves accuracy and eliminates burning Second land provides improved guidance when hand drilling Second land seals flutes to prevent chip squeezing and burning Unique brad point design produces cleaner holes while ensuring pin point accuracy in wood Roll-forged flutes and diamond ground tips for sharper, longer life