Eight leaves, every one a shape
On this page11
The group has eight leaves
Burr bit, collet, cutoff wheel, drill bit, router bit, sanding disc, small saw blade, and tap and die.
And they divide into two storage problems rather than eight
Shanked tools that stand upright, and flat discs that stack. Everything in the group is one or the other, and the two want different containers.
Drill bits, burrs, router bits and taps are shanked
They have a parallel shank and a working end, and the working end is the part that must not be knocked against anything. Standing them shank down protects the edge and lets a set be read at a glance.
Which makes height the governing dimension for half the group
Of the 224 containers on this shelf that record a height, the range is 1.25 to 6.745 inches with a median of 2.60. A jobber length drill bit in a common size is comfortably inside that.
Cutoff wheels and sanding discs are the flat half
They stack, and the stack wants a floor it fits rather than a column. Diameter governs: the shelf runs 1.062 to 4.625 inches with a median of 2.87, recorded for 211 of 238 rows.
Collets are the odd leaf and the most demanding one
A collet is a precision part. Its outside is a taper and its inside is a bore, and both surfaces matter. Loose in a jar with abrasive discs is the situation to avoid.
So the practical answer for this group is separation by kind
Not by size. A sorted set of drill bits in one container and a stack of abrasive discs in another, because the discs produce grit and the bits carry an edge.
And every leaf satisfies the second limb of the article definition
End use function dependent in whole or in part upon shape or design during end use. There is no clearer illustration of that clause than a tap, whose entire function is a thread form.
Which is why the third limb is the one that matters here
The question is never whether these items have a shape with a function. It is what they release under normal conditions of use, and that is not a question about the item in the jar.
No page here answers it
The determination belongs to an employer assessing a particular operation. These pages describe the test, name the group, and stop at the point where a catalog stops knowing things.