Tackform 2" DuraLock 20 Series Dual 20mm Ball-and-Socket Arm, Black — Metal Short Reach with Optional Anti-Theft Knob

This is a compact, heavy-duty 2" Tackform DuraLock 20 Series double 20mm ball-and-socket mounting arm with an optional anti-theft knob for a secure, low-profile device mount.

Small but engineered for strength, the Tackform 2" DuraLock dual-socket arm gives you a very short reach mounting solution built around the 20mm ball-and-socket ecosystem. It fits Tackform’s 20 Series platform and most other 20mm systems (not compatible with 25.4mm / 1" balls) and is tuned for high load capacity and long-term durability. The single-knob design makes repositioning swift, while the optional patent-pending anti-theft knob reduces the chance of accidental or opportunistic removal in demanding environments.

How does this arm handle vibration and heavy use?

The arm is metal-constructed and tested to higher load capacities than many competitors, giving a robust safety margin under normal and off-road conditions. Its short span keeps leverage low, reducing wobble and stress on sockets during vibration.

• 2" overall length with 1.3" ball-center spacing minimizes torque on mounts
• Engineered safety factor and material selection for repeated use
• Single-knob clamping locks movement for stable, vibration-resistant hold

Will this fit my existing 20mm mounting system?

Yes — the DuraLock 20 Series arm is compatible with Tackform’s 20 Series accessories and with many third-party parts that use a 20mm ball-and-socket interface, including common brands that follow that standard. It is not designed for 25.4mm / 1" (B-sized) balls.

• Direct fit with Tackform 20 Series components
• Works with many Bulletpoint, 67 Designs, iBOLT, and other 20mm systems
• Not suitable for larger 25.4mm / 1" ball systems

What does the optional anti-theft knob do and when should I use it?

The optional, patent-pending anti-theft knob adds resistance to unauthorized quick-release attempts and helps prevent the ball from slipping out of the socket if the fastener isn’t fully tightened. It’s useful for vehicles or public settings where a mounted device could be targeted or where rapid movement might loosen simple knobs.

• Helps deter grab-and-run theft scenarios
• Prevents ball disengagement from the socket if under-torqued
• Can be installed or removed depending on user preference

How compact is this arm and why choose it over longer arms?

This is Tackform’s shortest double-socket arm, designed for tight installations where minimal projection is required. The ultra-short reach reduces leverage, improving stability and lowering the chance of snagging or accidental impact in confined spaces.

• 1.3" ball-center to ball-center spacing for a minimal footprint
• Ideal for dash, center console, or close-proximity device placement
• Single knob allows rapid repositioning while delivering a firm lock

Who is this for? This DuraLock 20 Series 2" arm is aimed at riders, drivers, and equipment installers who need a rugged, low-profile mounting solution that integrates with the 20mm ecosystem. Choose it if you want proven mechanical strength, minimal reach, and the option to add anti-theft protection for mounts used on motorcycles, side-by-sides (SXS), boats, or public-facing vehicle applications. If you use 25.4mm/1" ball systems, select a compatible size instead.