Not a standalone cutter — without a blade it is only a grip.
Not the specialist choice at either extreme — being a middle length, it is neither the closest-control short handle nor the highest-leverage long one, so a job pinned to one end is better served there.
Not a mount for the wider mill blades — its fit is 5/16" and 3/8"; the broader flat-grind blades go in the metal handles.
Not a knife handle in the riveted sense — this line's trade knives come permanently handled and are not part of the extension system at all.
Set the extension and secure it (method per Hyde ⚑) so nothing shifts under load — a moving blade means a ruined cut and a hazard. Let the flats speak to your fingers. Index a flat face against the hand to read edge direction blind. Fit the handle to the hand and the blade to the work. A 4-3/4" middle grip changes how the tool sits, not what it cuts; choose length by hand and clearance. Protect the wood. Kept dry and never used to lever a seated blade, a hardwood handle lasts for years; levering is what ends them.
Asked before buying
BUYER QUESTIONS, ANSWERED BEFORE YOU ORDER
What is this handle for?
Seating an extension (mill) blade at a cutting station — the blade wears out and is replaced, the handle stays for years. Mount a 5/16" or 3/8" blade, set the extension, cut.
How long is it?
4-3/4" — a middle-length grip, between the 4-1/2" short handle and the 5-1/4" long one.
Is it different from the 57660?
Not in any way we can support — identical length, build, and blade fit; only the undocumented pattern code differs. We refuse to invent a distinction; choose by the code your station specifies.
Which blades fit?
Any 5/16" or 3/8" mill blade — the full extension-blade roster of this line.
Why does its title say "Flat Sided" when some others don't?
A listing-title inconsistency across the four handles; all four are the same flat-sided class per the catalog. It's not a product difference.
