Wonder mitre is designed to handle the convex surface of coving. It has specially shaped notches that grip the coving holding it fast.
providing
...

An extremely handy pocket sized reference booklet of data charts & tables for the drawing office, toolroom or workshop. This metric revision publication is produced by zeus precision charts ltd, who are members of the british standards institution.
the 28 laminated pages contain data on standard drill sizes & decimal equivalents, tapping drills & clearances for metric & imperial threads, bs 4500 tolerances, hardeners comparisons, jig boring co-ordinates for equally spaced holes, allowances for sheet metal bending & morse tapers.
also long tables for sine, cosine, tangents & cotangent.

...

Enamel frame economy type micrometer with tungsten carbide tipped anvils. Suitable for all external measurements in either workshop or inspection departments
friction ratchet
graduation; 0.01mm
range. 0-25mm.
type, external
supplied in a sturdy plastic case.




...

Enamel frame economy type micrometer with tungsten carbide tipped anvils. Suitable for all external measurements in either workshop or inspection departments
standard ratchet
graduations; 0.001mm.
range. 0 -25mm.
type, external
supplied in a sturdy plastic case.




...

Enamel frame economy type micrometer with tungsten carbide tipped anvils. Suitable for all external measurements in either workshop or inspection departments
standard ratchet
graduation; 0.0001in
range. 0 -1in.
type, external
supplied in a sturdy plastic case.




...

Enamel frame economy type micrometer with tungsten carbide tipped anvils. Suitable for all external measurements in either workshop or inspection departments
standard ratchet
graduation: 0.01mm.
range. 0 -25mm.
type, external
supplied in a sturdy plastic case.




...

Enamel frame economy type micrometer with tungsten carbide tipped anvils. Suitable for all external measurements in either workshop or inspection departments
standard ratchet
range. 25-50mm.
graduation.0.01mm.
type, external
supplied in a sturdy plastic case.




...