User Guide

ManualsBrandsStarrett ManualsCarpentry SquaresStarrett 11H-12-4R Combination Square with Cast Iron Head and Black Wrinkle Finish

Steel Rule

Spirit Level

Lock Bolt

Protractor Head

Lock Bolt

Square Head

Direct Reading Scale

Spirit Level (Reverse Side)

Scriber

Center Head

Laroy S. Starrett

(1836-1922)

Congratulations on your purchase of a Starrett

Combinaton Square. Starrett was the ﬁrst and is still the

best combination square available.

Invented by our Laroy S. Starrett, in 1877, the

combination square was literally the driving force in the

founding of The L.S. Starrett Company in 1880.

After more than 130 years, this practical and versatile tool

is still commonly utilized in a wide variety of applications.

Description and Components

The combination square includes a hardened steel

graduated rule and movable combination square and miter head with spirit level

and scriber. The square head has a precision ground 90° square face and a 45°

miter face. It is a highly versatile layout tool for scribing right angles and parallel

lines, and a measuring tool that can be used as a tri-square, miter, depth gage,

height gage, and level.

The Center Head is an available attachment that provides an easy means of

accurately locating the center of cylindrical or square work.

The Protractor Head is another available attachment. It has revolving turrets with

direct-reading double graduations, a full 0 to 180° in opposite directions. This

permits accurate and quick direct reading of angles above or below the blade.

Complete Sets are available including the rule and all three heads in a ﬁtted case.

Applications: Combination Square Center Head

Applications: Combination Square Protractor Head

Tips for Using Squares and Center Heads

• Ensure that the square is clean and located against a ﬂat surface – irregularities

such as burrs on metal or knots on wood adversely effect accuracy.

• While the steel scriber can be used on any material, it is most commonly used for

metal. A carpenter's pencil is normally used on wood, but a light cut with a utility

knife will produce a ﬁner line, and is also useful for cross grain scribing.

• When using a center head on a piece that may not be completely round, scribe more

than two intersecting lines to achieve the best possible accuracy.

starrett.com • 978-249-3551

Form 955 20M/S 01/10 Speciﬁcations subject to change.

Introduction, Assembly & Applications

The Starrett Combination Square

Summary of content (2 pages)

PAGE 1
Applications: Combination Square Center Head The Starrett Combination Square Introduction, Assembly & Applications Applications: Combination Square Protractor Head Tips for Using Squares and Center Heads Congratulations on your purchase of a Starrett Combinaton Square. Starrett was the first and is still the best combination square available. Invented by our Laroy S. Starrett, in 1877, the combination square was literally the driving force in the founding of The L.S. Starrett Company in 1880.
PAGE 2
Assembling and Reconfiguring Your Combination Square This tool was designed as a square that would move up and down a ruler blade with precision, thus allowing a wide range of applications. The tool consists of a blade with a machined groove on the center of one side and a square head with a lockable assembly and specially designed bolt to engage the slot. • When installing the blade into the head, be sure to align the bolt with the groove.