Feature(may vary by option.)

●Triple spiral FLUTE - Three cutting blades ensure faster and smoother cutting, while also providing stronger stability, feeling like a hot knife cutting in butter!
●TiAlN coating - With a surface hardness of 89 HRC, it can cut harder materials and achieve higher cutting speeds.
●M35 cobalt high-speed steel ladder drill - perfect for stainless steel/metal/wood/plastic/aluminum/copper and other metal plates.
●12 STEP SIZE - Includes 3/16",1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 11/16", 13/16", 7/8"

[3 & 16 -7 & 8 ]

[1 & 4 -3 & 4 ]

[1 & 8 -7 & 8 ]

Description

step drill bits