I often use this type of pocket hole jig because it's extremely practical in woodworking joints. I've also learned that there are customizable versions on the market, allowing users to freely set any angle based on their actual needs.

However, when trying to drill hard materials

I tailored this design for the Model 6000 bearings

Update notes:
Although I have finished printing the design, unfortunately, the actual effect did not meet my expectations. Not only did the sawdust fail to exit smoothly from the predetermined chip discharge holes, but it also directly penetrated into the bearing. If you plan to print this design, be sure to pay attention to this in advance.