OHTO PROMECHA MS01 Drafting Mechanical Pencil

The OHTO PROMECHA MS01 represents the pinnacle of Japanese drafting engineering, blending heavyweight mechanical precision with an all-metal architecture designed for architects, technical illustrators, and drafting purists. Crafted in Japan, the MS01 features an ergonomic knurled brass grip seamlessly joined to a hexagonal aluminum barrel, delivering an ultra-stable, low center of gravity that anchors your hand for uninterrupted line work and fatigue-free sketching.

Engineered Precision & Dual Customization

Unlike standard drafting pencils, the OHTO MS01 gives you full command over your writing and drafting geometry through its dual-adjustment system:

• Adjustable Lead Guide Pipe: Customize the length of the 4mm drafting sleeve to accommodate drafting straightedges and rulers, or retract it completely into the brass nose cone for safe pocket carry.
• Lead Advance Regulation Dial: Fine-tune the exact amount of lead dispensed with every click to match your drawing pressure and prevent unnecessary lead breakage.
• Low Center-of-Gravity Balance: The heavy knurled brass grip accounts for the 35g solid weight, shifting mass toward the tip for effortless stability and line control.
• Anti-Roll Hexagonal Barrel: Sleek aluminum hexagonal profile keeps the pencil stationary on slanted drafting desks and workbenches.
• Removable Steel Clip & Grade Indicator: Detachable heavy-duty steel clip for versatile grip preferences, paired with a built-in lead hardness indicator (HB, B, 2B, etc.) on the tail cap.

Technical Specifications

• Brand: OHTO
• Model: PROMECHA MS01 (MS01-03 / MS01-05)
• Lead Diameters: 0.3 mm (Navy Blue) / 0.5 mm (Silver, Black, Red, Blue)
• Body Material: Machined Brass (Grip & Mechanism), Aluminum (Hexagonal Barrel)
• Overall Dimensions: φ10 mm × 151 mm
• Weight: 35 g
• Mechanism: Push-button advance with guide pipe length regulator & lead feed adjustment
• Country of Origin: Japan

Frequently Asked Questions

How does the dual-adjustment mechanism work on the MS01?

The knurled ring near the grip adjusts the exposure of the lead guide pipe, allowing you to set it to your preferred drawing distance or retract it completely. The secondary dial adjusts the feed mechanism, controlling how much lead is pushed forward per click.

Can the pocket clip be removed?

Yes, the spring-steel pocket clip is fully detachable. If you prefer a completely clean, unobstructed grip during extensive drafting or rotation, you can slide off the clip effortlessly.

Is this pencil suitable for everyday writing as well as drafting?

Absolutely. While built for technical drafting and architectural sketches, its comfortable low-center-of-gravity balance and fully retractable sleeve make it an exceptional everyday writer that won't puncture pockets or bags.