Spiral drill according to, the patency of the front end of the drilling diameter slightly larger than the diameter of the cylindrical drill, it drill branch Luo head body and the drill handle, wherein, the head includes a head round, heavy cutting edge, the main cutting edge and screw tip head drill body, heavy cutting edge located at the head of the outer circle of the front end of the main cutting edge in the screw tip of roots and perpendicular to the axis, a screw tip lies in the drill, the shape is a right-handed cone, so that the utility model has the structure design is reasonable, drilling smooth, high efficiency, drilling hole wall roughness and chip removal, etc. Luo length relative circle number is also different.

wide edge the bit drilling straight. The design of the drill bit handle six angle is not easy to slip in the chuck.

after-sales service
1, purchase process in case of any problems, please you by telephone, QQ or email to contact us, light we will contact with you in the shopping process encountered.
2, if in a week in goods can receive timely, we after receipt of customer enquiries immediately query, and the corresponding problems to customers given the most timely reply.
3, if damage occurred in the transportation process, we will not bear any loss, but we can try my best to the product packaging, transport and communication to reduce transport losses to a minimum.
4, we deliver goods timely, and due to the shipping company delivery time delay caused by the loss, we do not assume responsibility and compensation.
shopping tips
because of the camera shot and computer display cause physical and pictures may have off color, if the color of the required please contact us in advance. Otherwise deemed to be acceptable may have a small deviation of color. Inconvenience please forgive!
due to relatively large fluctuations of raw materials, coupled with peer networks of malignant price competition, making us each a product price not very precise display in front of customers, here marked prices are for reference only! Need to contact!