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 - Organized, portable, and ready to deploy wherever your projects take you.
UNMATCHED DURABILITY - Crafted from VoHA material with 62HRC hardness for long-lasting wear resistance.
MADE IN JAPAN EXCELLENCE - Premium craftsmanship ensuring professional-grade performance every time.
COMPLETE 30 1 BIT ARSENAL - Versatile set covering +, SL, SQ, T, PZ, and H heads for every job.
PRECISION MAGNETIZED TIPS - Secure fastener grip reduces slips and speeds up your workflow.

The VESSEL IMPACT BALL™ Torsion Bit 30+1 PC Set features a comprehensive range of impact-rated bits made from ultra-durable VoHA material with a peak hardness of 62HRC. Magnetized tips ensure fastener retention, all housed in a sleek slide case for easy portability. Designed and manufactured in Japan, this set is engineered for both professionals and serious DIYers demanding reliability and precision.

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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
Part Number	426115
Item Weight	9.9 ounces
Item model number	IB31P02U
Size	One Size
Color	Factory
Finish	Unfinished
Power Source	Hand Powered
Item Package Quantity	1
Head Style	JIS
Compatible Fastener Range	0.25 inches
Usage	Amateur, Professional
Included Components	Manufactuered Brand Product
Batteries Included?	No
Batteries Required?	No

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

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