{"product_id":"3-25-inch-arca-type-clamp-long-black-hex-knob","title":"3.25\" Arca-Swiss Compatible Quick Release Clamp | Long Black Hex Knob","description":"\u003c!-- ===================== GRAY BANNER ===================== --\u003e\n\u003cdiv style=\"background:#e5e5e5;padding:12px 15px;margin-bottom:18px;\"\u003e\n    \u003cstrong\u003e3.25 Inch Arca-Swiss Compatible Quick Release Clamp | Long Black Hex Knob \u0026amp; 45mm Spacing\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003c!-- ===================== SEO BLOCK (TOP) ===================== --\u003e\n\u003ch1\u003e3.25\" Arca-Swiss Compatible Quick Release Clamp | Long Black Hex Knob\u003c\/h1\u003e\n\u003cp\u003e\n    The 3.25-inch jaw length \u003cstrong\u003eArca-Swiss compatible clamp\u003c\/strong\u003e is a versatile mounting solution engineered for maximum torque and precision. Featuring a \u003cstrong\u003elong black captive knob\u003c\/strong\u003e with an integrated 5mm hex wrench socket, this clamp allows for extreme tightening force while maintaining a low-profile footprint that won't interfere with flat mounting surfaces.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003c!-- ===================== QUICK OVERVIEW ===================== --\u003e\n\u003ch2\u003eQuick Overview \u0026amp; Key Features\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDual-Drive Long Black Knob:\u003c\/strong\u003e Ergonomic knob design includes a 5mm hex wrench socket for added leverage and security.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSurface Clearance Design:\u003c\/strong\u003e Specifically engineered to be mounted on flat surfaces without the knob interfering with the mounting plane.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e3.25\" Jaw Length:\u003c\/strong\u003e Provides an ideal balance of surface contact and compact design for professional Arca-type plates and rails.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVersatile Mounting Interface:\u003c\/strong\u003e Center socket is countersunk on top for 1\/4-20 or M6 screws and is natively threaded for 3\/8-16 studs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision Dual Mounts:\u003c\/strong\u003e Includes two outside 1\/4-20 tapped holes spaced exactly 45mm apart for specialized multi-point attachments.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSafety Relief Grooves:\u003c\/strong\u003e 2.6mm deep relief grooves prevent gear \"free fall\" by catching safety stops on Arca-type plates if the clamp is partially open.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAnti-Twist Integration:\u003c\/strong\u003e The rear side features a dedicated groove designed to match professional ball head connections, effectively preventing unwanted rotation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eField-Safe Hardware:\u003c\/strong\u003e The knob is fully captive, meaning it stops at maximum opening and cannot be lost or dropped in the field.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- ===================== PRODUCT DESCRIPTION ===================== --\u003e\n\u003ch2\u003eProfessional Arca-Type Quick Release Solution\u003c\/h2\u003e\n\u003cp\u003e\n    This 3.25-inch quick release clamp is built for the rigors of technical photography, from macro focus stacking to long-exposure landscape work. Precision CNC-machined from aircraft-grade 6061-T6 aluminum and finished with a durable hard-coat anodize, it delivers a tenacious, twist-free grip on compatible plates from major brands like RRS, Kirk, Wimberley, and Markins.\n\u003c\/p\u003e\n\u003cp\u003e\n    \u003cstrong\u003eAdvanced Torque and Reliability:\u003c\/strong\u003e The inclusion of a 5mm hex socket in the knob allows photographers to use a wrench for an extra-secure lock, providing peace of mind when supporting heavy telephoto lenses or complex modular rigs. Combined with integrated safety relief paths and an anti-twist rear channel, this clamp ensures your gear remains stable and protected in any orientation. Proudly made in the USA to professional-grade tolerances.\n\u003c\/p\u003e\n\n\u003c!-- ===================== SPECIFICATIONS ===================== --\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eJaw Length:\u003c\/strong\u003e 3.25 Inches (82.55mm)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKnob Type:\u003c\/strong\u003e Long Black with 5mm Hex Socket (Captive Design)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMounting Holes:\u003c\/strong\u003e Two 1\/4-20 tapped holes (45mm spacing)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCenter Threading:\u003c\/strong\u003e Threaded 3\/8-16 and countersunk for M6\/1\/4-20\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRelief Groove Depth:\u003c\/strong\u003e 2.6mm\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e CNC Machined 6061-T6 Aluminum\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black Hard-Coat Anodized\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hejnar Photo","offers":[{"title":"Default Title","offer_id":67701596913769,"sku":"F163b","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1278\/9353\/files\/F163b-2.jpg?v=1792110943","url":"https:\/\/www.hejnarphotostore.com\/products\/3-25-inch-arca-type-clamp-long-black-hex-knob","provider":"Hejnar Photo","version":"1.0","type":"link"}