So are any of these bits jis? Because I don’t see jis stamped

I’m going to say no, just because of how they’re labeled PH1 PH2 PH3. PH meaning Phillips. Vessel usually labels their JIS drivers +1 +2 +3 or P1 P2 P3. P meaning Plus. Though I’m surprised Vessel made a set with Phillips bits, not JIS bits. Having said all that, this is a decent set that I use regularly. I have only experienced cam-out either when using cheap screws, or operator error.

Does anyone know of the grooves on these line up properly with the ball detent on American style impact drivers?

The ball detent lines up with about the ball on the bit. It locks securely into an impact driver but has a couple millimeters of back and forth movement inside the collar. In a Milwaukee M12 Surge Impact Driver, just the head of the bit sticks past the collar. The movement is just slightly more then my long Milwaukee and DeWalt bits and extenders.

Are the cross points JIS?

Short answer - NO. The cross points are marked PH1 / 2 / 3 and PZ1 / 2 / 3. The PH is for Phillips and the PZ is for Pozidrive. I haven't tried the PZ on my JIS fasteners but based on the description they seem similar to my JIS Vessel screwdrivers. From the internet. "A Pozidriv has ribs between each of the four arms of the cross. This increases the grip between the bit and the fastener. A Phillips bit fits in a Pozidriv screw head, but it will most likely cam out before the fastener is fully tightened. ... A Pozidriv bit does not fit in a Phillips screw head"

Q: Vessel, do you offer metric hex 2.5 mmbits? thank you

Yes and we will prepare Hex 2.5mm tip bit in near future! By the way, Hex 3/32" is 2.3mm so it is a sort of 2.5mm.

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🛠️ Elevate your toolkit with precision and power – don’t get left behind!

COMPACT SLIDE CASE - Sleek, portable slide case keeps your bits organized and ready for action anywhere.
UNMATCHED DURABILITY - Crafted with VoHA material and heat-treated to a rock-solid 62HRC hardness for long-lasting performance.
MADE IN JAPAN QUALITY - World-class craftsmanship ensures reliability and toughness in every bit.
COMPLETE 30 1 BIT ARSENAL - Versatile 31-piece set covers every job from home projects to professional repairs.
PRECISION MAGNETIZED TIPS - Secure screws effortlessly with magnetized tips that reduce drops and speed up work.

The VESSEL IMPACT BALL™ Torsion Bit 30+1 PC Set features 31 high-quality, magnetized bits made from ultra-durable VoHA material with a 62HRC hardness rating. Housed in a compact slide case, this Japanese-engineered set is designed for professionals and DIYers demanding precision, longevity, and versatility in impact driving tasks.

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Brand	VESSEL
Item Length	7 Inches
Material	Metal
Finish Type	Unfinished
Number of Pieces	31
Drive Bit Shank Style	Hex
UPC	840921141310
Manufacturer	VESSEL
Country of Origin	USA
Item model number	IB31P02U
ASIN	B08WHYFQYL

VESSEL IMPACT BALL™ Torsion Bit 30+1 PC. Set in SLIDE CASE No.IB31P02U Made in Japan by VESSEL

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