4.00" Arca-Swiss Compatible Quick Release Clamp | Long Black Knob

The 4.00-inch jaw length Arca-Swiss compatible clamp is a professional-grade mounting solution designed for photographers requiring maximum leverage and security. Featuring a high-grip long black knob and a versatile mounting interface, this clamp provides an unyielding connection for telephoto lenses, macro rails, and custom modular camera rigs.

Key Features & Quick Overview

• Extended 4.00" Jaws: Offers a massive surface area for superior grip and stability when using professional Arca-type plates and long rails.
• High-Leverage Long Black Knob: The captive knob design ensures it cannot be lost in the field and stops at maximum opening for fast gear transitions.
• Precision Dual Mounts: Includes two outside 1/4-20 tapped holes spaced exactly 45mm apart, ideal for specialized multi-point attachments.
• Versatile Center Mounting: Center socket is countersunk on top for 1/4-20 or M6 screws and natively threaded for 3/8-16 tripod studs.
• Safety Relief Grooves: Integrated 2.6mm deep relief grooves prevent gear "free fall" by catching safety stops on Arca-type plates if the clamp is partially open.
• Anti-Twist Integration: The rear side features a dedicated alignment groove to match professional ball head connections, preventing unwanted rotation during use.

Professional Arca-Type Mounting for Technical Photography

Engineered for precision workflows, this 4-inch Arca-Swiss style clamp is CNC machined from solid aircraft-grade 6061-T6 aluminum. The long black knob provides extra torque, making it easy to secure heavy equipment with minimal effort. This "Micro-Vise" design ensures a rock-solid, twist-free connection compatible with plates from RRS, Kirk, Wimberley, and Markins.

Safety and Field Reliability: This clamp is built for the rigors of outdoor and studio environments. The safety relief grooves serve as a critical fail-safe against accidental drops, while the hard-coat black anodized finish provides exceptional wear resistance. Whether you are shooting architectural panoramas or balancing a long lens, this clamp delivers the reliability demanded by professional photographers.

Technical Specifications

• Jaw Length: 4.00 Inches (101.6mm)
• Knob Type: Long Black (Captive Design)
• Mounting Holes: Two 1/4-20 tapped holes (45mm spacing)
• Center Threading: Threaded 3/8-16 and countersunk for M6/1/4-20
• Relief Groove Depth: 2.6mm
• Material: CNC Machined 6061-T6 Aluminum
• Finish: Black Hard-Coat Anodized
• Origin: Made in the USA