Any use where a confirmed exposure figure is a buying requirement — until 42066's spec is verified, buy a carded sibling whose reach is known (the 1/4" 42067, the 11/16" 42062, or the 1/4"–7/16" 42065).
Plunge or stab cutting — the round tip forbids it.
High-volume all-day light cutting where hand fatigue dominates — the featherweight polypropylene Ultra Light (42056/42060) is the fatigue-spec answer.
Leveraged cutting into wood or board (trapezoid top-slides), precision film (9mm snap-offs), and trade cuts in leather or rubber (heritage square-points) are all other classes.
And it is not a tool for a building with no safety policy that simply wants the cheapest edge.
Asked at the counter
BUYER QUESTIONS ANSWERED BEFORE THE CART, NOT AFTER THE RETURN
What exactly is this knife's blade exposure?
Unconfirmed — the research record carries no exposure figure for 42066. Its name says "short/long"; for a defined reach, use the carded siblings (1/4" 42067, 11/16" 42062, or 1/4"–7/16" 42065) until Hyde publishes 42066's spec.
What does "uncarded" mean?
Supplied without the retail blister card — the bulk form used to stock a crew or facility, rather than to hang on a store peg.
Is it metal or plastic?
It is in the die-cast metal "Industrial Strength" Switchblade class (the rugged, long-lived body) — a class fact, not a separately-verified 42066 spec.
Does it self-retract and take round-tip blades?
Yes, as a member of the Switchblade safety class — the blade is out only while the button is held, and it runs round-tip blades so it cannot plunge.
Why is this guide shorter and more hedged than its siblings?
Because 42066 has no accepted product-fact claims in the record; honesty requires authoring to the class and gating the missing SKU-specific specs rather than inventing them.
