BAZHOU PERFECT COMBINATION:Countersink drill bit set includes 5 different sizes to satisfy you all demand. ELABORATE DESIGN:Countersink drill bit set is quick change compatible and has an adjustable counter sleeve depth with Allen wrench. MULTIPURPOSE:Countersink drill bit set perfect for wooden planks, plastic, soft metals, fiber board, particle board, plywood, alumiumn board etc. HIGH QUALITY:Countersink drill bit set is made by high speed steel and easy to use. Our drill have higher accuracy than the ordinary. GOOD PERFORMANCE:The countersink drill bit set have self-starting point and five-fluted design eliminates chatter and vibration for smooth operation to make clean, accurate and burr-free cuts. Delivery Quantity: 1setof 5 pcs, Package Contents: Only the above package contents, excluding other products. Size: 5 , 6 , 8 , 10 , 12 (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)