Description
Reviews
| 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 |
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.
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.
Huirui 420AB Fast-Drying Glue for Silicone - Bonds ABS, Stainless Steel, TPE, Rubber; High-Strength Instant Adhesive for Difficult Materials
$36.00
Color Proofing Instrument Ink Mixing Tool Sample Making Machine
$1,860.00
ABB Variable Frequency Drive ACS380-040S-02A6-4 - Brand New Original, 0.75kW/2.6A, Three-Phase 380V
$1,430.00
2026 Spring PEP New Edition Primary English Grade 3 Volume 2 Four-Line Three-Grid Word Cards for Teachers, Open Class Competition Creative Blackboard Design, Teaching Contest Blackboard Strips and Teaching Aids
$11.30
Cold Brew Yogurt Fermentation Equipment - Manual Old-Style Yogurt Processing and Filling Line
$113,050.00
Electric Spray Painting Pen Set for Babies and Toddlers, Non-Toxic Washable Watercolor Markers, Drawing Tool Kit Toy
$49.50
![[Buy 2 Get 10% Off] Painted Double-Layer Wool Felt Mat for Calligraphy and Painting](https://www.gosteppe.com/cache/small/product/270133/legacy-main-a12ad5b62abb27a9a45afaf4.png)
[Buy 2 Get 10% Off] Painted Double-Layer Wool Felt Mat for Calligraphy and Painting
$7.48
Compact Home Range Hood, Portable USB Desktop Smoke Extractor for Living Room Hot Pot and BBQ Odor Removal
$41.00
Office and Home Computer Cable Management Sleeve - Desktop Data Cord Organizer and PC Wire Collector
$6.50
Linear Bearing
$75.47
Thickened Aluminum Alloy Stainless Steel Floor Wire Raceway - Surface-Mounted Cable Cover Protector, Anti-Crush, Self-Adhesive Invisible Design
$2.13
Kids Foam Stamp Brushes - Mushroom-Tipped Painting Set for Kindergarten Art and Graffiti Projects
$2.38
Heisidike HZL-32 Portable Stone Removal Hook for Car Tire Tread Cleaning
$9.28
Bixilage Cheese Processing Equipment – Curd Fermentation Machine for Stretchy Hand-Pulled Cheese Production Line
$67,900.00
Essential Oil Soap Stamping Machine DIY Stamp Maker Semi-Auto Pneumatic Stampler Small Handmade Soap Equipment
$2,173.00
Inverted Barrel Water Stand - Simple U-Shaped Thickened Holder for Purified Water Buckets with Dispenser Outlet
$21.00
Qingling Pickup 2.8T Diesel Isuzu 4JB1-T1 Engine Turbocharger Pump Assembly
$1,502.00
Juli JL-499 Heat Resistant up to 150°C Instant Adhesive High Performance Low Whitening Transparent High-Temperature Fast-Drying Glue
$90.30
Stainless Steel Buffet Warmer with Hydraulic Lift - Commercial Electric Heating Chafing Dish
$882.00
Zhaobei New Felt Calligraphy Mat Anti-Pilling Painting Felt Chinese Painting Cloth Brush Character Calligraphy Felt Pad
$29.70
Fruit Picking Bucket with Shoulder Strap, Manual Fertilizer Spreader, Durable Rubber Harvest Container for Seeds and Chemicals
$26.57
Baohong Artist Grade Watercolor Pad - 100% Cotton Pulp, 300gsm, Glued on Four Sides, Available in 16K, 8K, 4K with Cold Press or Hot Press Texture
$42.00
Commercial Brush Peeling Machine for Sweet Potatoes, Ginger, Taro, Mustard Greens, and Kohlrabi
$15.90
No-Drill Invisible Cable Organizer – Self-Adhesive Wire Fixer, Data Cable Clip, and Net Cable Management Solution
$6.90
Large Stone Landscape Sculptures, Engraved Pebble Gate Stones, Cornerstones, Roadside Markers, Village Signs, and Lawn Memorial Stones
$838.05
Kitchen Sink Organizer Rack, Dish Drying Rack, Multi-Function Countertop Storage Shelf for Washing and Placing Bowls
$55.70
New Hanging Kitchen Sink Strainer Basket, Multi-Function Colander for Washing Vegetables and Filtering Leftovers
$7.74
Sting Bite Relief Pen Electric Bug Bite Relief for Indoor
$60.14
Thickened 160g Gouache Paper 8K/4K for Beginners and Art Exam Students - Professional Art Painting Paper for Watercolor, Gouache, and Acrylic Creation and Practice
$5.78
Pad Printing Ink Cup Sealing Ring Rubber Gasket Elastic Rubber Ink Cartridge O-Ring Silicone Ink Leak-Proof Eco-Friendly Ink Cup Seal
$9.70
![[Customizable] Blank DIY Bookmarks - Thickened Hard Cardstock in Multiple Sizes with Tassels for Kindergarten and Elementary Art, Calligraphy, and Reading Gifts](https://www.gosteppe.com/cache/medium/product/386159/legacy-main-05a2e5e73e5ac60017fbef5e.webp)
