7pcs HSS 5 Flute Countersink Drill Bit Set Reamer 3-10mm Chamfer Drill Bits

Description:  Single Flute edge chamfer 90 Degree;  Heat treated & tempered high-carbon steel;  Use on steel, aluminum & other metals, plastic or wood;  Enlarge or countersink holes, deburr edges.     Specification:  Product name: Countersink drill bit set;  Model number: 911781;  Material: High Speed Steel;  Color: Silver and black;  Chamfer Angle: 90 Degree;     Dimension:  3mm: (Dia) x 60mm(L);   4mm: (Dia)x 75mm(L);  5mm: (Dia) x 85mm(L);   6mm: (Dia)x 93mm(L);  7mm: (Dia) x 10mm(L);   8mm: (Dia)x 11mm(L);   10mm: (Dia) x 12mm(L);     Features:  1. Special designed steel counter sleeve countersinks or counter bores guide hole;  2. Adjustable counter sleeve depth with wrench;  3. Drill and countersink for wood screws without changing;  4. Drilling length can be adjusted for various length screws simply by loosening and tightening the setscrew;  5. It is suitable for drilling machines with chuck, for drilling on hard wood or wooden floor.     Package Included:  7 pcs x Woodworking chamfer drill bits;  1 pc x L-wrench