About this product

PREMIUM QUALITY - These hex shank wood drill bits are made of steel , and the chamfering sleeve are made of carbon steel with black oxide coating, which features with high hardness, wear resistance and provides excellent cutting ability.

TAPERED BITS - The design of tapered bit with sharp pointed tip can ensure the hole tight fit for screws. Wide cutting flute can increased the wood chips flow quickly and accurately to leave a clean pilot hole.

ADJUSTABLE LENGTH - These countersinking drilling bit built with depth adjustable counter bore attaches to flat on shank with the hex screws for control pilot hole depth, which can meet the different length of screws you needed.

PRODUCT SIZE - Includes 4 different sizes countersink drill bits (#6, #10, #13, #16), diameter of drill bits is 3mm, 3.5mm, 4mm and 4.5mm and the chamfer angle is 90 degree.

WIDE APPLICATION - Suitable for wood, fiberboard, particleboard, plywood, plastic,, rubber, etc. The 1/4 inch hex shank is compatible with most of drill chuck, hand drill bench drill, etc.