Accurate positioning, will not shift, sawdust automatic discharge from the both sides of the hole on the top of the drill, will not be stuck.
This product is used to open the hole of the hinge hole of the door and window. The drilling sleeve can fix the position well and ensure the accuracy of drilling.
How to use:
When drilling, adjust the hardness according to the appropriate wood, if the wood soft, can choose a smaller size, if the hard wood, you can choose the corresponding larger one.
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