Moody Tools 55-1750 Stainless Steel Precision Probe with Straight Tip #1, 25mil, 6-1/4" Overall Length

Would the tip strongly resist pulling out of the handle? I use probes like this to verify the location of studs behind drywall.

How long is the skinny part? How thick compared to a toothpick or straight pin? Sturdy enough to clean out light gunk from a small hole?