Drafting instruments are the foundation of accurate technical drawing. From triangles and compasses to beam compasses, dividers, irregular curves, proportional dividers, and pantographs, these tools help create precise layouts for architecture, engineering, surveying, and design work.
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Academic Transparent Triangles
Alvin Drafting$2.00 - $5.40These Academic Drafting Triangles have a double-taper cutout center for easy lifting, enhancing efficiency. Made from durable, extra-heavy acrylic, they resist discoloration and warping. Ideal for... -
Smoke Triangles - Inking Edge
Alvin Drafting$2.30 - $7.70The Alvin inking edge triangles are made of molded 0.10" thick polystyrene and feature a transparent non-glare smoke tint for easy visibility.Features: 30º/60º and 45º/90º trianglesAvailable in... -
Truflex II Flexible Curves
Alvin Drafting$9.60 - $23.90This lightweight aluminum Flexible Curve Rule is easy to shape and holds any curve firmly for accurate drawings and is made from premium materials that won't warp over time for long-lasting... -
Fluorescent Triangles - Straight Edge
Alvin Drafting$6.10 - $25.80The Alvin Professional Fluorescent triangle is extremely popular because the refracted light has an illuminating effect on the drawing by accentuating the triangles edge.Features: 30º/60º and... -
Comfort Compass & Beam Set
Staedtler$35.40The Staedtler 551 02 Comfort Compass Set is a precision compass set designed for accurate circle drawing in drafting, geometry, design, and technical drawing work. This set includes the precision... -
Professional Parallel Bars
Pacific Arc$154.80 - $218.50The Pacific Arc Straightedge Parallel Bars are perfect for drafting, engineering and construction applications.Features: Available in 4 lengths: 30", 36", 42" or 48"Professional quality, top-mounted... -
Paral-Liner Parallel Straightedges
Alvin Drafting$171.00 - $231.00The Alvin Paral-Liner Parallel Straightedge is a professional top-mounted drafting bar designed for precise ruling, technical drawing, drafting, and layout work. Built for both drafting tables and... -
2mm HB Compass Lead - 12/tube
Alvin & Co.$2.20Each tube holds 12 leads 2mm in diameter and ¾" long. Packaged 12 leads/tube. -
4.5" Small Bow Compass
Pacific Arc$5.95The Pacific Arc 4.5” Small Spring Bow Compass is a professional-quality drafting tool designed for precision and durability. Built with a true steel hoop structure, this compass delivers long-lasting... -
2mm 2H Compass Lead - 12/tube
Alvin & Co.$2.20Each tube holds 12 leads 2mm in diameter and long. Packaged 12 leads/tube." -
Pro-Draft Parallel Bar
Martin Universal$184.70 - $219.80The Martin® Pro-Draft Professional Parallel Straightedge comprises cutting-edge technology making the premier straightedge in its class. It features an aluminum body for strength and stability,... -
Bulk-Pak 2mm (2H) Compass Leads - 144/pk
Alvin & Co.$10.40A convenient way to refill standard drawing instruments with pre-sharpened chisel points. 2mm in diameter and ¾" long. -
Wood Pantograph
Alvin Drafting$37.40 - $47.70Unlock the power to create enlarged or reduced drawings up to 10x scale with the Alvin Wood Pantograph. Crafted with arms from seasoned hardwood and chromed steel hardware, it ensures durability and... -
Topaz Triangles - Inking Edge
Pacific Arc$3.40 - $48.35The Pacific Arc inking edge triangles are made of molded 0.08" thick acrylic and feature a transparent non-glare smoke tint for easy visibility.Features: 30º/60º and 45º/90º trianglesAvailable in... -
Fluorescent Triangles - Straight-Edge
Pacific Arc$3.40 - $31.55The Pacific Arc Professional Fluorescent triangle is extremely popular because the refracted light has an illuminating effect on the drawing by accentuating the triangles edge.Features: 30º/60º and... -
Jet-Bow Beam Compass Set
Alvin Drafting$65.70This versatile compass is user-friendly and perfect for artists, students, crafters, and hobbyists as a basic drafting or drawing tool for both projects and artwork. Packaged in a durable,... -
Scholastic Fluorescent Triangles - Inking Edge
Pacific Arc$2.00 - $8.95The Fluorescent Scholastic Triangle is a transparent drafting triangle designed for drawing, drafting, and geometry applications. Constructed from 0.08" thick polystyrene, it features a fluorescent... -
24" Hip Curve
Alvin Drafting$19.65This Hip Curve ruler boasts sharp, wear-resistant graduations for easy readability in both English and metric measurements. Designed for architects, engineers, and mechanical draftsmen, it's suitable... -
6.5" Spring-Bow Compass
Pacific Arc$9.80Traditional Spring Bow compass features a true steel hoop for longevity and reliability that represents the very best value on the market.Features:6.5" Bow CompassCenter wheel for fine adjustments... -
Basic Bow Combination Compass Set
Alvin & Co.$38.40Features: 6" compass with interchangeable pen, pencil and divider parts4-1/2" compass with interchangeable pen, pencil and divider parts6" beam bar extension and slide coupling6" friction divider...
Drafting Instruments for Technical Drawing and Precision Layout
Architecture and engineering students still learn geometry, spacing, and layout fundamentals on these tools during manual drafting coursework. Many professionals keep a few on hand for concept sketching and quick layout work long after most of their day moves into CAD software.
Choosing Instruments That Hold Up
A cheap compass is one of the most common frustrations students run into. Low-cost compasses slip, wobble, or drift out of adjustment mid-drawing, which turns a simple circle into a repeated headache over a semester of geometry or drafting coursework. Spending a bit more on a compass that holds its setting pays off fast once you are using it several times a week.
Triangles and parallel bars see just as much use. A well-made triangle stays true, with clean edges that won't chip or wear quickly, while a quality parallel bar can last for decades with proper care. It's not unusual for us to hear from architects and engineers who still have the same parallel bar they learned on years ago and are looking for parts to keep their bar in working order.
Still Used Alongside CAD
Hand drafting has not gone away. Instructors use these tools to teach geometry, spacing, and proportion before students ever open a CAD program, and many working designers still sketch ideas by hand before modeling them digitally. Compasses, triangles, and parallel bars stay part of that process even after the drawing moves onto a screen.
Complete Your Drafting Workspace
Pair drafting instruments with related drafting tools and drawing supplies to create a complete technical drawing and design workspace.
Shop Drafting Templates | Shop Drafting Pencils & Leads | Shop Ruling & Measuring Tools | Shop Technical Pens | Shop Drafting Paper | Shop Drafting Boards |
