Fuk Tool Penis Sheath and Ball Stretcher by XR Brands

The Fuk Tool Penis Sheath and Ball Stretcher by XR Brands is a dual-function device that adds 7 inches of insertable length while stretching and separating the testicles. It combines size improvement with ball sensation in one flexible TPR sleeve, suited to couples exploring together or men seeking layered stimulation during extended sessions.

What it is

The Fuk Tool Penis Sheath and Ball Stretcher by XR Brands combines two functions in one device: a length-adding sheath for the shaft and an integrated ball stretcher with dual apertures. The sheath slips on to add 7 inches of insertable length whilst the lower section cradles and stretches the testicles separately, creating distinct sensations above and below. Made from flexible TPR, the material moves with your body whilst maintaining firm support, and the textured surface adds friction throughout. You'll find it performs differently from basic cbt gear that focuses on restraint alone, since this device prioritises simultaneous improvement and sensation play.

The dual-aperture design is what sets it apart from a standard penis sheath. Rather than treating the testicles as secondary, the stretcher keeps them separated and under gentle but persistent tension whilst you're wearing the improvement above. This layered approach—size increase combined with ball stretching—creates a more complex sensation than either element alone, particularly during extended wear.

What stands out

• Dual-function design: Adds substantial length whilst simultaneously stretching and separating the testicles, creating two distinct sensations at once rather than one effect only.
• Flexible TPR construction: Material stays firm enough to hold shape yet moves naturally with your body, making extended sessions feasible without discomfort or loss of position.
• Textured surface: Strategic ridges and patterns across the shaft section grip and stimulate with every movement, intensifying sensation for both partners during use.
• Generous length addition: Seven inches of insertable extension dramatically transforms perceived size, delivering a noticeable change in sensation and visual presence.
• Simple slip-on access: No fasteners, laces or adjustments needed—the open design lets you position it quickly and reposition as needed during a session.

The detail

• Material: TPR (Thermoplastic Rubber), flexible yet structured, textured throughout the shaft section
• Overall length: 8.5 inches; insertable length 7 inches; maximum diameter 1.65 inches
• Weight: Lightweight; exact weight not specified but typical for TPR sheaths of this size
• Dual apertures: Upper opening for shaft insertion, lower opening for testicle separation and stretching
• Colour: Black
• Power source: None; entirely manual, non-electronic
• Box contents: The sheath and ball stretcher device only; no batteries, charger or accessories included

Finding your size in a cbt device

Start by measuring your flaccid or semi-erect girth at the base of your shaft using a soft measuring tape. The Fuk Tool reaches a maximum diameter of 1.65 inches (approximately 5.2 centimetres), which suits most users; if you're significantly thicker, test-fit before committing. The 7-inch length addition is fixed, so focus on whether that extension feels right for your frame and the sensations you're seeking.

Position yourself standing or sitting comfortably before your first attempt. Slip the device on slowly, starting with the shaft opening, then guide your testicles into the lower aperture one at a time. You may find it helps to warm the TPR slightly under warm water first, making it marginally more pliable. Take time to settle into the stretch—the ball tension builds gradually, and your body adapts over the first few minutes. If you want to combine this with additional ball stretching, Parachute Testicle Stretchers offer adjustable weight and different pull dynamics once you've established your comfort with this device.

Is this the one for you?

Care and storage

Wash the Fuk Tool Penis Sheath and Ball Stretcher with warm water and mild soap after each use, paying particular attention to the textured surfaces where body fluids and lubricant can accumulate. Dry completely with a soft cloth before storage—moisture left inside encourages mould and odour. Store in a cool, dark place away from direct sunlight and extreme heat, which can degrade TPR over time. Keep it in a pouch or sealed container if you prefer privacy or want to prevent dust settling on the textured surface.

Read more on this

Understanding the sensations and safety practices involved in ball stretching and shaft improvement helps you get more from this device and recognise your own comfort boundaries. For detailed guidance on techniques, aftercare and how different CBT tools work together, read our feature on Cockball Torture.

What to expect

First-time users often underestimate how much 7 inches of added length changes the visual and tactile experience. The moment you put it on, the size difference is immediate and noticeable. The textured surface grips during movement but is not aggressive—it's made to stimulate rather than abrade. Many people find the initial fit slightly tight in the ball aperture; this is normal and eases within a few minutes as you settle into position.

The ball stretching sensation builds gradually rather than hitting hard all at once. During your first session, you may feel significant pulling, especially during the first 10–15 minutes. As your body adapts, the pressure becomes part of the background sensation rather than the sole focus. Extended sessions (an hour or more) are feasible, though you should remove the device if your testicles start to feel numb or look noticeably discoloured.

The TPR is forgiving during movement and doesn't pinch or twist unexpectedly. It maintains its shape through partnered use and repositioning, and the textured ridges don't wear smooth with normal wear. Cleaning is straightforward—soap and water handle both fluid and lubricant without damage. Most users report the device lasting well with regular use when stored properly.

How it compares

Why people keep buying it

Snag the Fuk Tool Penis Sheath and Ball Stretcher from Malechastity.com.au and experience the impact of combining two distinct sensations in one wearable device. The dual-function design delivers what single-purpose tools cannot: simultaneous size transformation and ball stretching, all in flexible TPR that moves with you. Order it with discreet Australia-wide delivery and discover why it remains a go-to choice for men and couples seeking layered improvement and sensation play. Trusted by Keyholders and Locked Men Across Australia.