Colt 10150783 FCE Professional HSS Pen Blank Drill Bits Set in Plastic Case, 5-Piece Patented cutting tip with four cutting points creates fine sawdust for reduced resistance and heat build-up allowing longer bit life while maintaining sharpness in soft and hard woods and acrylics Parabolic flute design quickly ejects sawdust, eliminating the need to withdraw the bit until the hole has been drilled through Unique cutting tip ensures clean entry and exit points without breaking or chipping Center point on cutting tip provides pin point accuracy in wood drilling applications Made in Germany Set includes 7mm, 10mm, 27/64-Inch, 3/8-Inch, and Letter 'O' bits