SUPERIOR QUALITY --- HOME-MART 6542 (M2) Drill Bit Set Made of high speed steel with titanium coating, fully polished, drop forged and heat treated, strong and durable. Titanium coated to reduce friction and heat steel. Comes with one 4-12mm five-step bit, one 4-20mm nine-step bit, and one 3-12mm ten-step bit.
HEXAGONAL SHANK ---HOME-MART HSS Step Cone Drill Bits Comes with a 1/4 inch regular hexagonal shank, fits into every power tools like electric drill and electric screw driver securely. The hexagonal shank can simply stuck the drills stably into a bit holder without a screwdriver, prevents slippage when in chuck.
DOUBLE FLUTED DESIGN --- Double fluted design for optimum speed and accuracy, smoother cutting, each step is clearly labeled with the depth diameter in steps. Provided with small pressure and very easily cut through wood, brass, steel, gypsum board and other surfaces.
FEATURES --- Marks holes locations and starts drill bits and screws, preventing wandering, heat treated alloy steel punch with sharp precision tip, corrosion-resistant brass body with non-slip knurled grip. Includes a nylon handy storage pouch to protect them.