* Drill contents & size:
    10pcs per: 1.0, 1.5, 2.0, 2.5,
    3.0, 3.5, 4.0, 4.5,5.0, 5.5, 6.0, 6.5,
    7.0, 7.5, 8.0mm (total: 150pcs)
* 5pcs per: 8.5, 9.0, 9.5, 10mm(total: 20pcs)
* Material: din338，hss 4241 material drill,
    edge ground, bright finish, 118 degree