Ohto Ballpoint Pen TL01-B5 black

The Ohto TL01-B5 is a ballpoint pen in miniature format: 91 mm long – exactly as long as a business card – and with a shaft diameter of 3.7 mm, slimmer than many standard ballpoint refills. Shaft, clip and push mechanism are made of metal (aluminium, SK steel, brass), giving the featherweight pen of 3.1 g a surprisingly solid feel. The oil-based 0.5 mm needle point tip writes finely and reliably – and the pen can be permanently refilled with commercially available D1 refills.

Key Features

• Compact dimensions: 91 mm length and 3.7 mm shaft diameter – fits flat in wallets, business card holders or notebook covers without bulging.
• Two-part push mechanism: A button at the top extends the tip; a second, side button next to the clip retracts it securely. No accidental extension in your pocket.
• Full metal construction: Aluminium shaft, SK steel clip, brass tip and push button. Despite the miniature format, no play, no rattling – the pen sits comfortably in your hand.
• Oil-based 0.5 mm needle point tip: The ink flows evenly and dries quickly enough for compact writing in tight spaces – marginal notes, calendars, small notes – without smudging.
• Refillable with D1 refills: Compatible with the Ohto R-4C5NP and other standardised D1 refills. The pen remains in use long-term, even with alternative ink types.
• Card holder included: A flat plastic holder in credit card format (85.6 × 60 mm) holds the pen securely and allows insertion into card slots or book inserts.

Application & Tips

• Wallet carry: The pen sits together with the card holder in a normal card slot – ideal for those who don't want to carry a case but always want to be ready to write.
• Planners and compact notebooks: In A6 or Field Notes format, space is often tight. The TL01-B5 fits in the slip pocket or under the elastic band without adding bulk to the notebook.
• Labelling and marginal notes: The 0.5 mm needle point tip allows very fine handwriting in small spaces – ideal for margin notes, indexing and closely spaced entries.
• Refill selection: Those who prefer faster-drying or smudge-resistant ink can resort to compatible D1 refills from other manufacturers. D1 is a widely established standard with broad availability.
• Secondary office pen: As a silent companion in shirt pocket format or on the desk as a spare – the solid clip holds securely even on thin notebooks.

For Minimalist Enthusiasts

The TL01-B5 is the successor to the Ohto Minimo and shares its 91 mm length, but simplifies the push mechanism: extend at the top, retract on the side – a clear functional separation that prevents misuse. The combination of aluminium shaft and brass components at the tip and push button is unusual in miniature format; most pens of this size rely on plastic. The weight of 3.1 g makes the TL01-B5 one of the lightest full-metal ballpoint pens in this length class – noticeably less than a coin, but with significantly more precise handwriting than feather-filled note pens. The tip is designed as a needle point, which allows clean line guidance even with fast writing, as long as the refill doesn't run too soft.

Technical Specifications