u/Dry_Schedule_7520

Drive Size: 3/8 in.
Claw Type: Single-pawl
Tooth Count: 24
Ratchet Feed Angle: 15°

Length: 170 mm (6.69 in.)
Head Width: 26.8 mm (1.06 in.)
Head Thickness: 18.7 mm (0.74 in.)
Weight: 177 g (6.24 oz)

Back Drag: 3.2 cN·m

A well-used MITOLOY ratchet from 1974.
Simple 24-tooth, single-pawl design.
A bit of slop and not particularly smooth—but no skipping, and it still engages reliably.

Simple, no-frills design—built to do the job.

Starting the repair.
It’s fun thinking about the previous owner while working on this.

I've been testing screwdrivers across different standards — ANSI, ISO, DIN, and JIS. The subtle differences matter more than I expected, especially with JIS screws.

One comparison led to another, and somehow it came to this.

My wife saw the pile and laughed. Turns out she's the standard I'm most compatible with.

I run a YouTube channel where I test and measure tools to share real data with other craftspeople. These are the rulers and measuring instruments I actually use for that work.

Main rulers: TOEi (TOEI Industrial Co., Japan) steel rulers — 300mm, 600mm, and 1000mm, all Grade 1 precision — paired with their Scale Stoppers (SS-300, SS-600, SS-1000). The Scale Stopper is a clamping stop block that locks anywhere on the ruler for repeatable measurements. Probably not well known outside Japan, but incredibly useful.

Also in the kit:

- TOEi No.70 combination protractor (stainless, made in Japan)

- Shinwa digital angle finder

- Tajima dial caliper

- Marking gauge (similar to Matsui Seimitsu K-10, maker unknown) — for scribing parallel lines, not depth measurement

- Brass taper gauge

These have been reliable companions in my kit for a long time. I love the weight of the hammers and the feel of the Bauhaus rulers, but I only really know them by name. If any tool historians here have info on their background or era, I’d love to hear it!