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The Oxballs Masterjack is a heavy, two-ended male stroker with a handle you can actually hold on to. Most sleeves are smooth tubes that get harder to grip the more lube you use; this one is covered in raised diamond-plate texture, so it stays put in a slick hand. It suits guys who already own a stroker or two and want something with more weight, more grip and a choice of two very different tunnels.
Each end of the Masterjack opens into its own channel. One side is the tighter of the two, with ribs and nubs inside for more friction and a busier sensation. Flip it over and the other side has a wider, ringed opening that feels smoother and less restrictive. Use the open end to warm up and the tight end when you want more intensity, or stick with whichever suits your size and preference. Our supplier lists the inner channel at about 5 inches.
Oxballs moulds it in Plus+SILICONE, the brand's softest blend, which it describes as combining the warm feel of silicone with the stretch of TPR. The outside has a suede-like finish with diamond-plate grips along the body and handle, which is what keeps it from sliding around mid-stroke. At roughly 8 oz it has real heft. That weight gives a fuller, more substantial feel than lightweight sleeves, and it means you can let the toy do some of the work on the downstroke rather than squeezing hard.
Lube the opening you're starting with and your shaft. Water-based lube is the easy choice; Oxballs rates Plus+SILICONE for silicone lube too, which lasts longer between top-ups. Hold it by the handle and start slowly, adjusting how firmly you squeeze to change the pressure. If the tight end feels too snug at first, use more lube and give the material a moment to warm up. Resting the closed end against a pillow or the bed frees one hand and gives you a hands-light option when your wrist gets tired, since the weight keeps it from wandering.
This isn't a discreet travel sleeve or a first stroker for someone unsure what they like. It's chunky, industrial-looking and heavy, and the textures are strong. If you've found light, smooth strokers too slippery or too bland, though, the Masterjack is a solid step up. Fans of automatic strokers may still prefer a motor; this one is fully manual, so there's no charging and no noise.
Rinse both tunnels with warm water and mild soap right after use, flexing the material so water reaches between the ribs. Let it drain and air-dry fully, ideally standing on one end, then the other, before putting it away. Store it in a breathable cloth pouch, away from other soft toys and from dust.
Compare it with other strokers and sleeves, see the rest of the Oxballs range, or read our guide to male masturbators and automatic strokers.
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