Cushion ring effect suppresses the bit runout.

*6pc set of the popular size for drilling in the actual sites.
*Supplied in a zipper bag for prevention of loss or dirt. Can store the drill bits in a tightely-sealable bag.
*X-shape (cross) thinning process on the tip-end helps it fit the object to drill and drill a hole without punching.
*《High hardness HHS steel》 is adopted and the sharp edges of the tip-end are kept. "
*The drill is not taken out of the bit shank or does not spin because they are integrated by pressing drawing process. "
*Cushion ring suppresses the center runout or wobbling: in the electric power tool, the cushion ring sticks out in its chuck, and suppresses wobbling and get rid of the bit runout.
*Color-coded cushion ring for each size. Easy to find the necessary size.