Attributes

Brand	-
Category	Stationery, Educational Electronics & Office Supplies / Technical Pens
Origin	-
Tip Sizes	0.3mm and 0.5mm dual tips
Ink Color	Black
Line Type	Double-line / Parallel line generator
Usage Scenario	Architectural drafting, engineering drawings, exam preparation
Material	High-quality plastic barrel with metal tip housing
Ink Type	Water-based pigment ink, quick-drying
Compatibility	Suitable for standard drafting paper and tracing paper
Package Contents	1 x Double-Line Technical Pen
Special Feature	Fixed 1.5mm spacing between parallel lines
Target Audience	Registered Architects, Constructor Exam Candidates, Engineering Students

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Essential for manual drafting classes

My professor recommended this brand. The parallel lines are perfectly spaced, which makes creating wall sections incredibly fast. Highly recommend for any student in architecture school.

Anonymous

Mar 14, 2026

Rating: 5/5

Sturdy and Reliable

As a level 1 constructor, I need tools that work every time. This pen has a nice weight to it and the ink flow is smooth. No skipping or blotching on my technical diagrams.

Anonymous

Mar 12, 2026

Rating: 5/5

Best investment for my toolkit

I was skeptical about dual-tip pens, but this one is precise. The 0.1 level precision mentioned in the description holds up well for detailed column work. Will buy again.

Anonymous

Mar 02, 2026

Rating: 5/5

Perfect for the Architect Exam

I bought this specifically for the Registered Architect exam preparation. The double-line feature saves so much time when drawing walls compared to using a ruler twice. The 0.3mm and 0.5mm tips are very consistent.

Anonymous

Mar 02, 2026

Rating: 4/5

Great tool, takes practice

The concept is brilliant for engineering drawings. It took me a few sheets of paper to get the angle right so the lines don't smear, but once I got the hang of it, my drafts look professional.

Anonymous

Mar 01, 2026

Rating: 3/5

Good but cap is tight

The pen itself writes beautifully and the double line function works as advertised. However, the cap is extremely tight and sometimes hard to remove quickly during an exam. Otherwise, good quality.

5 FAQ

Q: What is the exact distance between the two lines generated by this pen?

A: The fixed spacing between the parallel lines is approximately 1.5mm, which is standard for most architectural wall representations.

Q: Is this pen suitable for left-handed users?

A: Yes, the pen works for both left and right-handed users. However, left-handed users should allow a brief moment for the ink to dry before moving their hand across the fresh lines to prevent smearing.

Q: Does this work well on tracing paper without bleeding through?

A: Yes, the fine 0.3mm and 0.5mm tips are optimized for drafting paper and tracing paper. The ink dries quickly to minimize bleed-through on standard weights.

Q: Can this pen be refilled with standard technical pen ink?

A: No, the Jinwannian Double-Line Pen is designed as a disposable unit. Once the ink is depleted, the entire pen should be replaced to ensure line consistency.

Q: Is the ink waterproof once it dries?

A: The ink is water-based and quick-drying. While it resists smudging after drying, we do not recommend submerging the paper in water as it is not fully waterproof like solvent-based inks.

Explore your interests

Deli Universal Staples 24/6 Standard Size No. 12 Staple Pins 0012 - Stainless Steel Durable Small Staples for Staplers

$7.90

XuedeLe Calculator, Goddess Style for Office, Cute Student and Accounting Solar Multifunctional Internet-Famous Mini Small Computer, High Aesthetic Pink Female Voice Model with Large Keys for Commercial Use

$8.50

Bulk Pack | GuGu WanWu Concentric Circle Dual Blush Gradient Soft Light Round Stickers for Journaling, Basic Decorative Marking and Background

$4.25

Qingheji About Youth Classmate Record Book for Elementary School 6th Grade Ins Niche Minimalist High-Aesthetic Graduation Memorial Album

$37.50

Tengzhou Dongfang Hailida ZQ3050 Mechanical Radial Drill Press Gears z20/39 Teeth, z29/47 Teeth, z31/58 Teeth

$140.10

[Customizable] Blank DIY Bookmarks - Thickened Hard Cardstock in Multiple Sizes with Tassels for Kindergarten and Elementary Art, Calligraphy, and Reading Gifts

$9.90

Custom Record Book Table Creation Printing Account Book Register Appointment Book Table Book Detail Sheet Printing Customization Various Account Books Powerful Manufacturer

$4.25

Deli Transparent Tape Dispenser - Mini Desktop Cutter with Serrated Edge for Office Supplies

$6.70

Rongbaozhai Shengtan Calligraphy Brush Special Mixed Hair Medium Wolf Hair Medium Kaifu Professional Grade Goat Hair National Painting Extra Large Clerical Script Yan Style Kaishu Xingshu Beginner Calligraphy Set

$29.70

Calligraphy Fountain Pen with Curved Nib for Students and Adults, Hand-Polished High-Aesthetic Hard Brush Pen for Business, Office, and Personalized Signatures

$13.82

Custom Desk Mat Board Compatible with Old Guangming Yuandi Study Desks - Winner/Wisdom/Benevolence Solid Wood A Series Custom Mats

$18.00

Marie's Sketch Tool Set for Beginners, Basic Sketching Pencils (2B, 4B, 6B), Complete Art Student Drawing Kit with Easel and Professional Sketch Pens

$20.00

Zuohui Paper Palette: Tear-Off Mixing Paper, No-Wash Mixing Book, Disposable Palette for Watercolor, Acrylic, and Oil Painting, Peel-Off Mixing Board

$5.60

Red Fat Professional Watercolor Brush Set: Round Tip Liner Brushes, Nylon Brushes for Art Students; Black Swan Series Single Pack Available

$2.45

Comic Introduction Hand-Drawn Tracing Book Anime Character Line Art Drawing Children's Sketching Beautiful Girls Ancient Style Character Painting Basic Self-Study Tutorial Sketching Cartoon Album

$7.65

HITOTO Oil Pastel Set Super Soft Heavy Color 36 Colors 48 Colors Macaron Series Middle School Kindergarten Art Drawing Dedicated White Oil Chalk Soft Crayon Painting Paper Scraper Tool Complete Set

$18.58

Kraft Paper Notebook B5 Thickened for Junior High, Exam Prep, High School Homework, College, Large A4 Journal, 2026 New 16K/A5 Work Log, Lined Single-Line Exercise Book

$2.35

Art Portfolio Bag, Black Thickened Canvas Large Capacity Backpack for Art Exams and Sketching, Dedicated for Art Students, Portable Multi-Function Double-Shoulder Drawing Board Bag, 4K Art Bag

$23.49

The Tale of Outcasts: Hero Exploration Acrylic Standee, Haruka Katsuragi Acrylic Figure

$14.20

Home Picture Book Stand, Solid Wood Bookshelf, Storage Rack for Books and Toys, Floor-Standing Display Shelf

$1.00

Free Shipping 50 Pieces 4.2 Yuan 420 Fen Postal Postage Envelopes No Address No Zip Code Discounted Envelopes for Registered Mail Real Photos

$135.93

Pure Cotton Red Scarf for Elementary Students, Fade-resistant Universal Wrinkle-resistant Small Size for Grades 1-2, Thickened Large Size for Junior High, High-quality Full Cotton Young Pioneer Scarf for Children and Schools

$14.10

Shanjiu Thickened Plastic Snap Button File Bag Transparent A4 with Label Archive Stationery Bag Student Storage Custom Logo

$5.67

Chinese Painting Pigments 12 Colors Beginner Brush Elementary Student Children Introductory Materials Non-Toxic Gongbi Painting 24 Colors Ink Wash Painting Tool Set Chinese Art Supplies Toolbox Complete Landscape Painting Partition Box

$6.80

Postmark Card Album 120 Sheets High Capacity Postmark Card Train Ticket Star Card Album Card Sleeve Business Card Album Business Card Book

$4.99

33cm Kraft Cardboard with Colored Borders, Square with Circular Inner Cutout, Thickened Antique-Style Hard Cardboard for Children's Art and Drawing

$10.60

B5 Fun Dot Grid Pen Control Practice Copybook - Complete Preschool Workbook Set for Ages 3-6, Daily Training Sheets

$7.48

HD LCD Landscape Drawing Board for Children; Electronic Handwriting Doodle Pad, Small Blackboard for Early Education and Intelligence Development

$3.28

Dragon Ball Card Binder Nine-Grid Storage Album Large Capacity Pikachu Bag Cards Super Saiyan Card Sleeves

$34.70

Free Shipping CBB61 Start Capacitor 6UF 450V Single-Phase Motor Electric Fan Exhaust Fan Blower Range Hood Capacitor

$21.30

Zhongbai Paint Marker SP-110 Oil-Based Touch-Up Pen DIY Album Graffiti Pen White Marker Pen Touch-Up Pen

$2.33

Linen Oil Painting Board Ultra-Thin Beginner Painting Hand-Painted Oil Paint Acrylic Pure Cotton Canvas Art Material Lightweight Portable

$10.28

touchmark Antique-Style Raw Edge Paper for Calligraphy - Unlined Xuan Paper for Brush Writing Practice, Handmade Bamboo Pulp Yuanshu Paper, Thickened Semi-Sized Calligraphy Work Paper

$11.80

Duosuoduoxi Multifunctional 4K Art Portfolio Bag - Thickened Wear-Resistant Large Capacity Backpack for Art Exams, Sketching, Plein Air, and Art Storage

$66.50

Pride Leads to Loss, Humility Brings Benefit - Handwritten Calligraphy Wall Art Desktop Ornament Decorative Study Student Inspirational Learning Calligraphy

$8.40

Mao Taizi Reading Stand Kids Desktop Book Holder Multifunctional Student Reading Bracket Learning Artifact Book Clip Fixed Book Clamp Portable Desktop Book Stand

$9.90

Xiaohongshu Same Style Pink Bud Mint A7 Loose-Leaf Planner, Korean Ins Style High-Aesthetic Portable Diary Notebook

$5.02

Zhang Xiaofeng 'Peach Blossoms' Rose Quartz Brush Rest, Brush Holder, Brush Mountain, Brush Stand, High-Aesthetic Creative Calligraphy Accessory for Women, Jade Cultural Study Ornament, Small Gift

$35.70