Japanese made ADJUSTABLE COUNTER SINK BIT - TUNGSTEN CARBIDE StarM 501 Adjustable Countersink with Carbide Tip
Specifications: Size of Drill Bit: min 3mm to max 7.2mm Size of Countersink: Min 11mm to max 16mm Standard Accessories: L Shape Hex Key Set of 2 Blades How to Use: Put the inner drill into countersink Adjust depth of pre-hole Match between cutting edges and centre of inner drills Tighten the screw on both sides Insert into drilling tool Drill holes in required positions