0.9mm Anonymous Shipping 2.3mm Core 4-Piece Diamond Drill Bit Set High Precision Tip

0.9mm Anonymous Shipping 2.3mm Shank Core 4-Piece Diamond Drill Bit Set - High Precision Tip
Product Description ★Length: 42mm ★Shank Core: 2.3mm ★Drilling Depth: 3.5mm ★Quantity: 4 pieces
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Ideal for hard materials such as metal, glass, gems, pearls, and tiles.
We prepared these because customers who purchased mini-routers and micro-drill bits were having trouble drilling into high-hardness materials, unable to center the drill bit, and unable to drill holes because the drill bit tip would jump around, as center punching like with iron is not possible.
These can also be used for centering and engraving hard gems and precious stones like glass and tiles. The short needle-like tip reduces tip wobble, positively impacting processing accuracy.
Use these bits to establish the center before using drill bits suitable for your material.
Diamond drill bits with extremely fine tips and straight needle points have a low pass rate during manufacturing, making highly precise ones very expensive tools. However, by using them with water for cooling, you can use them for a long time.