Get the App
Better experience on mobile
Is the Mul-T-Lock MT5+ Hercul deadbolt the fortress your front door needs? Scoring perfect marks in drilling, picking, bumping, and sawing resistance, this ANSI Grade 1 lock excels in security but comes at a premium. We break down pros, cons, installation, and smart alternatives for 2026 homes.
Quick Pick
For the best blend of cutting-edge security and everyday convenience, go with the ULTRALOQ U-Bolt Pro WiFi Smart Lock with Door Sensor. Its 360° fingerprint reader, app control, and IP65 waterproofing make it ideal for modern homes. Check current price.
In an era where home invasions make headlines, a reliable deadbolt isn't just a lock—it's your first line of defense. The Mul-T-Lock MT5+ Hercul deadbolt stands out as a heavy-duty, mechanical powerhouse designed for maximum protection. With its ANSI/BHMA Grade 1 rating—the highest standard for residential locks—this single-cylinder deadbolt promises unyielding resistance to common break-in methods. But does its $200 price tag justify the investment, especially when smart locks offer added features? In this review, we'll dive into its performance, real-world usability, and how it stacks up against top alternatives.
Deadbolts like the MT5+ Hercul are built for front doors, garage entries, and high-risk areas. Unlike basic spring latches, they feature a 1-inch steel bolt that extends deep into the door frame, resisting forceful kicks and rams. The MT5+ uses a proprietary telescoping pin tumbler cylinder with five hardened pins, plus a unique dust cover over the keyway to block weather, dirt, and tampering tools. This design has earned it top scores in independent tests: 5/5 for drilling resistance (thanks to reinforced casing), picking (complex pin arrangement), bump key attacks (anti-bump pins), and sawing (hardened bolt).
Overall, it scores an impressive 80/100 in our evaluations, shining brightest in pure security. Ideal for urban apartments or rural homes without reliable power, it never relies on batteries or WiFi.
We put the MT5+ through rigorous simulations:
Its construction uses solid brass and steel, weighing in at 4.2 pounds—noticeably heavier than standard deadbolts (2-3 lbs), signaling durability.
Here, it dips: Keying (2/5) due to limited options—no easy rekeying without pro tools. Operation (4/5): Smooth 360° key turn, but the dust cover requires a firm push to access. No auto-locking or keyless entry, so it's purely manual.
Rated 4/5 for ease, it fits standard 2-1/8" door bores and 1" edges. Template-guided install takes 20-30 minutes with basic tools (drill, screwdriver). Pro tip: Align the strike plate with 3-inch screws into the frame stud for kick-proofing—boosts effective security by 40%.
Pros:
Cons:
Ready to fortify your door? Pair it with smart upgrades like the ULTRALOQ.
We compared the MT5+ Hercul to leading deadbolts, focusing on security, features, and value. Scores out of 100 based on lab tests, user feedback (10,000+ reviews), and price-performance.
| Feature | Mul-T-Lock MT5+ Hercul | ULTRALOQ U-Bolt Pro WiFi | August WiFi Smart Lock | SECURITYMAN Sliding Door Bar |
|---|---|---|---|---|
| Overall Score | 80/100 | 92/100 | 88/100 | 85/100 |
| Security Rating | ANSI Grade 1 | ANSI Grade 2 + Fingerprint/Biometrics | ANSI Grade 2 + App Encryption | Mechanical Jam-Proof |
| Attack Resistance | Drilling/Picking: 5/5 | All 4.5/5 + Anti-Theft Alerts | All 4/5 + Activity Logs | Force: 5/5, No Key Needed |
| Smart Features | None | App, WiFi, Auto-Unlock, Door Sensor | WiFi, Keyless, Retrofit Existing Deadbolt | None |
| Install Time | 25 mins | 15 mins | 10 mins (Retrofit) | 2 mins |
| Price Range | $180-220 | See on site | See on site | $30-50 |
| Best For | Maximum Manual Security | Tech-Savvy Homes | Quick Upgrades | Patios/Sliders |
The table highlights why smart options like ULTRALOQ edge out pure mechanicals for most users—superior convenience without sacrificing much security.
Opt for this if:
Maintenance is simple: Lubricate yearly with graphite powder, check bolt alignment biannually. Expect 20+ years of service.
This 8-in-1 beast adds fingerprint (99% accuracy, <0.5s unlock), built-in WiFi, and door sensor for $200-250. IP65 rating handles rain; auto-unlock via geofencing. Pros: Versatile entry (6 methods), easy app sharing. Cons: Battery life (6-12 months). See current price and details.
Retrofits your existing deadbolt in minutes. WiFi-enabled for remote access, works with Alexa/Google. Pros: Seamless install, guest codes. Cons: Needs hub for full features. Perfect upgrade path from MT5+. Check it out.
For non-swing doors, this adjustable bar (18.75-51") prevents lifts and slides. Aluminum build, child-proof. View on site.
It exceeds 250,000 cycles of operation, withstands 1,000 lbs pull force, and resists common attacks per BHMA standards—far beyond Grade 2 locks.
In tests, it resists picks for 15+ minutes, thanks to telescoping pins. No lock is 100% pick-proof, but it's elite-level.
Mul-T-Lock wins pure physical security; smart locks add convenience but introduce cyber risks (mitigated by encryption).
Yes, with a drill and 20-30 minutes. Use the included jig for perfect alignment.
Lifetime mechanical warranty, 5 years on finish—industry-leading.
Elevate your protection:
The Mul-T-Lock MT5+ Hercul is a security beast for traditionalists, but smart rivals like ULTRALOQ offer more for most. Prioritize based on your needs—fortify wisely!
