why there isn’t the length written? Lol

Only the ad writer can answer that. They're standard drill bits. However, they're crappy, crappy, crappy. I broke 5 of the 1/16 ones within a few days under normal use. They're cheap Chinese junk.

I am trying to find 20180517 108 -w257 from union tools

this is the same thing, apparently. "20180517" is the date of manufacture... https://www.amazon.com/Drillpro-Titanium-Carbide-Engraving-Hardwood/dp/B07178JW9J

Will they fit black and decker drills?

Will work in any size drill chucks but some of the larger 3/8 and larger chucks might not go small enough for the very small drill bits.

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60PCS SMALL DRILL BIT SET

Product ID: 672417763

Details

Material
Titanium Alloy
Finish Type
Steel Titanium
Shank Type
Straight
Cutting Angle String
118 Degrees
Brand
INTOO

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$33.77

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Details

Material
Titanium Alloy
Finish Type
Steel Titanium
Shank Type
Straight

Description

INTOO Mini Drill Bit Set 60 Pcs+12 Pcs Free High Speed Steel HSS Titanium Micro Drill Bits 3/64"-1/8" Metal,Plastic,Wood, Small Drill Bit

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