The Lockmaster 4-Inch Bio-Based Resin Cock Cage is a black rigid ABS device with bio-based resin, a ventilated enclosure, four interchangeable base rings, a two-piece interlocking construction, and keyed locking hardware. The current retail box identifies an easy-to-attach two-piece cage and says two keys are included. Compare other designs in the Chastity & Pup Play collection or browse the Electric brand collection.
Verified product details
| Store SKU | ELD-LM-003 |
|---|---|
| Maker SKU | LM-003 |
| GTIN / UPC | 4890808285299 |
| Color | Black |
| Maker material specification | ABS and bio-based resin |
| Construction | Rigid ventilated two-piece interlocking cage and interchangeable base ring |
| Closure | Keyed locking hardware |
| Package contents supported by current evidence | Black cage, four base rings, locking hardware, and two keys shown on the retail box |
| Maker product designation | 4 inch |
| Included ring diameters | 36, 40, 45, and 50 mm (approximately 1.42, 1.57, 1.77, and 1.97 inches) |
Material, key-count, and measurement boundaries
The maker’s structured specification lists ABS and “Biosurced Resin.” The current store wording, “ABS with bio-based resin,” keeps both supported facts without implying an independently verified resin percentage, carbon footprint, biodegradability, compostability, recyclability, or environmental certification. The maker does not publish medical-grade, body-safe, hypoallergenic, phthalate-free, nonporous, or sterilizable claims for this product.
The maker description says “two sets of keys,” while the current retail box says “2 keys included.” Because those first-party statements do not establish the same quantity, this page relies on the photographed box for the two-key count and does not promise four keys. Check the received package before use and contact the seller before opening if the visible contents do not match the order.
“4-inch” is the maker’s product designation. The current first-party page does not label that number as internal cage length, usable length, external length, or overall assembled length, and it does not publish an internal cage diameter or assembled gap. The four millimeter measurements describe the included base rings only. Do not use the designation or ring sizes as a complete fit guarantee.
Choosing among the four rings
A rigid ABS-and-resin cage does not stretch to correct a poor fit. Begin with the least restrictive ring that keeps the assembled device stable without pinching, pulling, trapping skin, concentrating pressure, or interfering with urination. The four included diameters allow comparison, but they do not make the device universal-fit. Read the chastity-cage fit, materials, and safety guide before selecting a ring.
Test the ring, cage, interlocking points, and lock before wear. Confirm that the selected ring seats correctly and that the two pieces connect and separate without force. Keep skin and hair clear of the joint and locking area. If the device shifts, pinches, pulls, blocks urination, or becomes tighter with swelling, remove it rather than moving to a more restrictive ring.
Locking and rapid-removal planning
Test every received key before locking the device on the body. Keep one working key immediately accessible to the wearer or a trusted person who can remove the device without delay, and store any spare separately in a known, quickly reachable place. Do not treat the lock as escape-proof or tamper-proof, and do not begin wear when immediate removal cannot be arranged.
For partnered or keyholder play, agree on consent, duration, check-ins, stop words, privacy, and who holds each working key before locking. Consent can be withdrawn at any time. A role-play agreement, planned duration, or keyholder decision never overrides symptoms or the need for prompt removal.
First-use checklist
- Inspect the cage, all four rings, interlocking points, lock, and every received key. Do not use a part with a crack, chip, sharp edge, rough seam, warping, or unreliable lock.
- Read the package instructions and practice complete assembly, unlocking, disassembly, and removal before placing the device on the body.
- Select the least restrictive stable ring. Keep skin and hair away from the joint and locking area during assembly.
- Begin with a brief, fully monitored fit check while awake, sober, and able to assess comfort, color, temperature, swelling, sensation, skin condition, urination, and removal.
- Recheck every contact point soon after locking and repeatedly during wear. Remove the device at the first sign of a fit, circulation, skin, urination, or lock problem.
Remove immediately for pain, increasing discomfort, numbness, tingling, loss of sensation, unusual coldness, marked swelling, pale, blue, purple, or dark discoloration, pinched or broken skin, bleeding, or difficulty urinating. If the lock jams, the device cannot be removed promptly, or symptoms continue after removal, seek urgent medical care. Do not delay care to protect the product.
Ventilation does not replace monitoring
The enclosure openings provide access and visibility, but they do not prevent pressure, swelling, trapped skin, circulation changes, residue, or hygiene problems. Inspect the skin, edges, joint, ring, and locking area rather than assuming a ventilated cage is automatically safer or cleaner. Avoid numbing or desensitizing products because they can hide pain or pressure.
The maker markets the product for shower use but does not publish a maximum wear time. Fit and swelling can change over time, so no single duration is safe for every person. Do not sleep in the device, leave a wearer unattended, or continue when removal becomes less certain.
Related Lockmaster comparisons
For a clear side-lock option, compare the Lockmaster 3.5-Inch See-Through Cage. For an open-bar metal option, compare the Lockmaster 3.75-Inch Prisoner Cage. Each page controls its own material, measurements, ring design, lock placement, care guidance, and availability.
Cleaning, drying, and inspection
The manufacturer describes the resin as waterproof and shower-safe. That marketing claim does not establish an immersion depth, soak time, water rating for the lock, or a sterilization method, and it does not mean the cage or lock is boil-safe, dishwasher-safe, machine-washable, or chemically sterilizable. Follow the received package directions for the exact cleaning method.
Unlock and disassemble removable components when the instructions permit. Rinse away any permitted cleaner and residue from the ventilation openings, rings, joint, and lock exterior. Let every component and key dry completely before reassembly or storage. Review the Materials & Care hub and cleaning and storage guide; the product instructions take priority.
Inspect for cracks, chips, sharp edges, warping, rough seams, lock damage, or a missing key after cleaning. Retire any component if fit, skin contact, locking, cleaning, or rapid removal is no longer reliable. For sharing, use only a cleaning or barrier method compatible with the received instructions; do not promise sterilization or elimination of all cross-contact risk.
Storage and ordering notes
Store the cage, four rings, lock, and keys clean, fully dry, and unlocked in a container away from direct sunlight, high heat, moisture, children, pets, and anyone who should not have access. Keep every working key identifiable and retrievable. Browse the Chastity & Denial tag or return to the full shop for more comparisons.
Review Shipping & Discreet Packaging for parcel information. Opened intimate products can have hygiene-related return restrictions, so check Returns, Refunds & Hygiene before opening the package.
