For comparison its about the size of the plus sign beside the Google eyes to your right!How's that for a comparison!Depth is enough I can feel it withmy fingernail as it goes in.I cannot see fibers.I did make a Dupont eopxy mix and filled it in .I can finish the tip section from the first guide to tip like the wraps are clear coated and I don'care if that section is glossy or not.