Custom covers + gentle bitter finish—for longer-looking, polished hands.
Nail-Biter Stoppers™ (NBS) is your go-to for smarter nail care. We make custom covers—five pieces, thumb to pinky—with a gentle bitter finish to discourage biting and keep your nails looking great.
To give you a quick, invisible fix: custom nail covers that go on easy, stay put, and quietly discourage biting—so your nails look longer, cleaner, and way less chewed-up. All while feeling and appearing totally natural.
Syed Irtaza Hussain, Founder.
Aleksandar Lazic, Chief Design Engineer.
We created NBS™ as a straightforward, effective fix for better-looking nails.
JTMS NBS operates as a venture under the Jacks of All Trades & Masters of Some Master LLC, benefiting from its ethical framework and support. Plans for establishing it as a separate series LLC are under consideration, pending product development and market success.
Onychophagia, commonly referred to as nail-biting, is a prevalent habit that results in shortened, uneven nails. It is estimated to affect a significant portion of the population across various demographics.
The Nail-Biting Challenge
This habit often leads to aesthetic concerns, including irregular nail length and appearance. Addressing it can improve overall hand presentation and grooming standards.

Nail-biting affects more than just appearance, impacting health, psychology, and daily life as shown in the table above.

This table shows the prevalence of onychophagia across regions, with percentage ranges and estimated millions affected, highlighting its global impact.
Nail-Biter Stoppers™ offers a practical and innovative approach to improving nail appearance.
Our precision-crafted covers feature five custom-fit pieces (thumb to pinky) with a safe bitterant coating. Designed for easy application, they provide a discreet physical barrier and a natural-looking finish that helps discourage biting while promoting a polished, well-groomed look.
Step 1: Nail Preparation
Trim and file nails using the NBS kit's cutter and file for a smooth base.
Wipe fingertips with alcohol swab; let dry 1–2 minutes.
Safety: Adhesive is toxic if ingested and may damage surfaces—protect workspace with paper towels.
Proceed to Step 2 when ready.
$49.99
Includes:
20 universal-fit covers
Adhesive, nail-filer, tools
Plus: 1 month free unlimited custom covers—we'll work with you for perfect fits.
Refills: $29.99/set anytime after.
Discreet. Natural. Easy.
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