Mũi khoan xoắn ốc đơn 9 inch

Bored a 9-inch bit through maple and the single-spiral flute pulled chips out clean instead of packing them in the hole. Cut stayed straight the whole way down. I've had to back out and clear shavings constantly with my old bits, so this was a nice change.

I was honestly dreading cleaning out the chips from my last deep-drilling project, but these single-spiral bits cleared the waste so easily I didn’t have to stop and poke at the hole once. The nine-inch length gave me the reach I needed without any wobble, and the cut stayed surprisingly clean the w

Drilled a bunch of deep holes in oak this weekend and the chips came flying out clean every time, no clogging or binding like my old twist bits. The single-spiral flute really does the job for clearing waste, and the 9-inch length got me through some thick stock without a problem.