When you're buying hand tools, you don't often choose between a precision engine gauge and a classic plane spare in the same cart. But that's exactly the situation here. The Proform Parts 66788 TOOL is listed at $94.55 and is built to measure rod-bolt stretch during engine work. The other three listings are Vintage Stanley 78 Rebate Plane Spur & Screw parts, priced from $13.16 to $13.47, for repairing or completing a classic Stanley rebate plane. The right pick comes down to one question: which job are you solving?
Quick take
If you need to check rod-bolt stretch while tightening an engine, the Proform Parts 66788 TOOL is the only listing designed for that job. If you own a Stanley 78 rebate plane and need its spur and screw, any of the three used Vintage Stanley spares will keep the old plane working. The prices sit at opposite ends of the hand-tools spectrum, so the decision is clear once you know your task. There is no single correct answer in this group; the right hand tool depends on the task, the part, and your budget.
Listed price comparison
| Product | Listed price | Price bar | What it is for |
|---|---|---|---|
| Proform Parts 66788 TOOL | USD 94.55 | Rod-bolt stretch measurement | |
| Vintage Stanley 78 Rebate Plane Spur & Screw (listing at $13.47) | USD 13.47 | Stanley 78 rebate plane spare | |
| Vintage Stanley 78 Rebate Plane Spur & Screw (listing at $13.17) | USD 13.17 | Stanley 78 rebate plane spare | |
| Vintage Stanley 78 Rebate Plane Spur & Screw (listing at $13.16) | USD 13.16 | Stanley 78 rebate plane spare |
Decision matrix
- Rod-bolt stretch measurement during an engine job: Proform Parts 66788 TOOL.
- Stanley 78 rebate plane restoration or repair: any of the three Vintage Stanley spurs.
- Lowest cash outlay for the same spare part: the least expensive Stanley listing.
- A listing with an explicit "Good used" condition note: the Stanley listing described that way.
- A new, ready-to-use precision gauge with a gloss aluminum body: Proform Parts 66788 TOOL.
Proform Parts 66788 TOOL
This is the specialized option in the group. It is a stretch gauge meant to sit on a rod bolt while you tighten it, with a high-tension spring that keeps it positioned on the bolt. You take a reading before torque, tighten to the spec, take a second reading, and compare the difference against the manufacturer's information. The aluminum body has a gloss finish, and the dial reads in 0.001-inch increments across a 0 to 0.001-inch range. Choose it when your project is a precision engine measurement. The trade-off is that it is the most expensive listing here by a wide margin, and its narrow dial range makes it a single-purpose tool rather than an everyday hand tool.
Vintage Stanley 78 Rebate Plane Spur & Screw (listing at $13.47)
This used listing is a vintage-original Stanley part made in the United Kingdom. It is identified as Catalogue Part L, the spur and screw for a Stanley 78 rebate plane, and it is described as being in good used condition. Choose it when you want the condition note stated up front and you are okay with a vintage spare that shows age through normal use. The limitation is that it is a single part, not the whole plane, and it costs a little more than the two other Stanley spurs. If you are pairing it with a plane you already own, the modest upcharge may matter less than the clear condition note.
Vintage Stanley 78 Rebate Plane Spur & Screw (listing at $13.17)
The second Stanley listing is also a used, vintage-original spare, made in Sheffield, England. It is a genuine Stanley part and fills the same Catalogue Part L role as the other spurs. Consider it when you want a middle-priced Stanley spare and the description's "Used - As per pictures" wording is enough for you. Its limitation is that it does not carry the "Good used" condition note, so you will have to judge wear from the photos before deciding if it fits your plane. For a restorer who plans to clean and fit the part anyway, this listing sits between the other two in price.
Vintage Stanley 78 Rebate Plane Spur & Screw (listing at $13.16)
The lowest-priced listing is still the same genuine Stanley part: a used, vintage-original spur and screw made in Sheffield, England. If all three Stanley listings are essentially the same spare, this one gives you the same part for the least cash outlay. Choose it when the exact condition wording matters less than keeping the cost down, and you are comfortable using the photos as your guide. The limitation is that it is listed simply as used, with no "Good used" note, so the visible condition may be less certain than on the listing that carries that note. For budget-minded buyers, this is the most direct way to get the part.
Final recommendation by use case
For rod-bolt work, the Proform Parts 66788 TOOL is the only listing built for that measurement task, and its 0.001-inch dial is why it carries the higher price. For a Stanley 78 rebate plane, any of the three Vintage Stanley spurs will do the job; choose the least expensive Stanley listing to spend the least, or choose the one with the "Good used" condition note if you want that clarity. Match the hand tool to the job, and the choice stops being a clash of categories and becomes a simple fit.
