Pentel Energel 0.5 mm Rtx Retractable, 12 Pack of 6 Black &

The Verdict

The Pentel Energel 0.5mm RTX is the pen that makes you wonder why you ever settled for anything less. With 240 ratings averaging 4.8 stars, this isn’t a niche favorite — it’s a mainstream workhorse that office workers, students, and left-handed writers consistently swear by. But is the 12-pack actually worth your money? Let’s break down what you’re really getting.

What’s in the box: Twelve retractable pens — six with black ink, six with blue. Each pen measures roughly 5.6 inches and features a 0.5mm needle-point tip, a rubberized grip section, and a metal pocket clip. The refills are standard Energel LRN5, which means you can replace them instead of tossing the entire pen. That’s a detail many budget 12-packs skip entirely.

Performance is where the Energel earns its reputation. The liquid gel ink flows effortlessly — no pressing hard, no skipping on cheap paper, no blobs when you pause mid-thought. The 0.5mm tip is the sweet spot: fine enough for margin notes and detailed work, but bold enough that your writing doesn’t look like spider legs. The ink dries almost instantly thanks to Pentel’s proprietary formula.

One buyer put it simply: “I’m left-handed and these are the only pens I’ve found that don’t smear all over my hand. The ink is dry before my hand passes over it.” That’s not a marketing claim — it’s the real-world experience of someone who’s tried dozens of alternatives.

What buyers consistently praise:

• Smoothness: Multiple reviewers describe the writing experience as “gliding” or “buttery” — the ink flows with minimal pressure.
• Consistency: No hard starts, no skipping after the pen sits unused for a week. The cap seals well even though it’s retractable.
• Value: At roughly $1.50 per pen in the 12-pack, these outperform many $3-4 single pens from premium brands.

Where it falls short — and honestly, it’s minor. The ink capacity is the biggest complaint. Because the ink flows so freely, you’ll go through refills faster than a standard ballpoint. If you write for hours daily, expect to replace a pen every 3-4 weeks. The grip is also on the slimmer side — fine for most hands, but if you have larger fingers or arthritis, you may want to look at the thicker Energel X model. And the forced 6/6 color split is annoying if you only use black ink.

Who should buy this:

• Left-handed writers who’ve given up on smudge-free gel pens — this is your solution
• Students taking heavy lecture notes who want smooth writing without hand fatigue
• Office professionals who need a reliable pen that doesn’t dry out between uses
• Bulk buyers who want a solid desk stash and don’t mind the blue/black split

Skip it if: You prefer ultra-fine 0.3mm tips, you want a heavier metal-barrel pen, or you’re a light writer who loses pens faster than you use them — the 12-pack might be overkill.

FAQ:

Q: Do these pens smear on highlighters? A: Yes, if you highlight immediately after writing. Wait 10-15 seconds for the ink to fully set, and you’ll be fine. The ink is water-based, so it’s not permanent.

Q: Can I use these on glossy or coated paper? A: They’ll work, but drying time increases significantly. Stick to standard office paper for the best experience.

Q: Are the refills easy to find? A: Yes — the LRN5 refill is widely available on Amazon and in office supply stores. The pen body will last for years with regular refills.

The Verdict: 4.6/5 stars

Buy it if you want a smooth, reliable, smudge-free writing experience at a price that won’t make you wince. The 12-pack is practical for home, office, or classroom use.

Skip it if you’re a heavy writer who hates replacing pens frequently, or if you need a single color only. For everyone else — this is the pen you’ll reach for first, every time.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.