Vac-U-Lock - Knuckle Up

Taking hands-on play to the next level, the feisty Knuckle Up accessory allows for total control in penetration and complete versatility through an extensive selection of compatible Vac-U-Lock attachments.

Knuckle Up features:

• Material: ABS
• Waterproof
• Phthalates Free
• Compatible with all Vac-U-Lock™ attachments
• Ergonomic knuckle grip for enhanced control
• Gender-inclusive design for solo or partner play

Size and material:

• Material: Durable ABS plastic (non-porous, body-safe)
• Attachment port: Vac-U-Lock™ plug (standard size)
• Style: Finger grip enhancer with attachment compatibility

🔥 Pleasure Scale™ Rating

This Toy: 🧪 Curiosity Satisfied

Who is this strap-on accessory for?

The Knuckle Up is ideal for:

• Curious beginners exploring strapless penetration without full harness setup.
• Couples seeking more grip and control in dildo-based play using fingers rather than straps.
• Anal or vaginal toy users wanting more precision during solo or partner use.
• People who love modular toys and want a low-profile way to use their Vac-U-Lock collection.

How to use the Knuckle Up?

1. Choose a Vac-U-Lock™ dildo or attachment and firmly insert the base into the Knuckle Up plug until it locks securely.
2. Slide your fingers through the grip section (works like brass knuckles for a controllable hold).
3. Apply water-based lubricant generously to the attachment and body areas for comfortable penetration.
4. Start with slow, steady movements to explore depth and angles with your partner or solo.

Great positions to try:

• Face-to-face (missionary-style): Allows for eye contact and easy control over depth and rhythm.
• Partner on all fours: Provides precision during vaginal or anal penetration with excellent grip.
• Sitting on a chair or bed edge: Perfect for low-angle forward strokes or solo practice.

How to clean and care for the Knuckle Up?

• Cleaning: Wash thoroughly with warm water and mild soap or a non-alcoholic toy cleaner after use.
• Lubricant compatibility: Water-based lubes only—safe and won't degrade ABS or the Vac-U-Lock plug.
• Drying: Wipe down with a lint-free cloth and let air dry completely before storing.
• Storage: Store separately from silicone toys in a cool, dry place away from direct sunlight.

Strap-on accessory practical use info:

• This toy is meant to be used alone or with a partner

Additional information:

• Compatibility: Works exclusively with Vac-U-Lock™ attachments—dildos, plugs, etc.
• No vibration built-in: Can be paired with a vibrating Vac-U-Lock™ dildo or a separate external vibe.
• Gender-inclusive: Designed for use by anyone with fingers—no harness needed.

Special considerations when using Knuckle Up:

• Grip strength: Some effort required to hold and stroke comfortably; people with limited hand mobility may need support.
• Lubricant control: Too much lube on fingers may cause slippage—apply lube only to toy and body.
• Secure lock: Always double-check that the Vac-U-Lock™ plug has fully engaged before use to prevent dislodging.

User experience tips

• Warm the dildo attachment under water before play for a more lifelike feel—especially if using realistic styles.
• Try the Knuckle Up solo first to get familiar with grip and control before involving a partner.
• If you're prone to wrist fatigue during extended play, give yourself breaks or alternate hands mid-session.
• Store the Knuckle Up separately from your attachments to keep the plug tight and preserve grip integrity.
• Use a mirror for visual feedback when experimenting with penetration solo—helps perfect aim and motion.