blade drawn toward you at a steep angle, downforce directly over the edge — on this parent, with the second hand on the knob, which roughly doubles controllable pressure without doubling fatigue. The full pull doctrine is the scrapers line doc's and is cited, not restated. Specific to this blade: match the edge to the pressure. Rough edges reward the knob's full two-handed downforce in heavy build; smooth edges want moderated pressure — they are finishing tools, and driving them like hogging edges chatters the surface they exist to refine. Read edges in raking light (a dull run reflects a bright line; a rolled burr glints along one face). And the governing boundary: this blade's natural habitat — old, multi-coat, failing paint — is exactly where lead lives. Pre-1978 buildings are assumed lead-bearing; containment, wet methods, and RRP obligations on paid work are the scrapers line doc's full section, inherited by every card (EPA — Lead RRP Program).
Asked at the counter
BUYER QUESTIONS ANSWERED BEFORE THE CART, NOT AFTER THE RETURN
Does this fit the 10280?
Not assertable. The store title mentions it; no accepted claim states it; the 10280's own record is a name and nothing more. Until that resolves, this blade is sold as what the claims say it is: the 10540's replacement .
Does it fit the 10520?
No claim says so, and this store won't invent one — the 2-edge and 4-edge systems differ in grind and mounting, and same-width is not same-fit .
Which edges do I use first?
On heavy build: rough, then rough, then smooth, then smooth — hog with both coarse edges, finish with both fine ones. On light peeling: smooth only, and save the rough pair.
Can the rough edges be sharpened?
A file will cut them, but what it leaves is a filed edge, not the factory rough grind — refiling walks them toward smooth . Treat the rough pair as spendable and the smooth pair as maintainable.
Is the 11135 a different blade?
No — identical blade, two to the card instead of one. Pack count is the only claim-level difference.
How long does one card last?
Rotation gives four working edges and the file extends the smooth pair; what actually ends a blade is damage — nail heads and masonry — or a rough pair spent mid-hogging-phase, which is the honest argument for the 2-pack on big jobs.
