5-pack Bosshead Clamp Holder Lab Duty Boss Head Clamp Holder

Accepts rods up to 21mm diameterMade of high-quality Metal body with plastic knobs, ensuring it durable and sturdy constructedLarge; easy-to-rotate knobs help provide extra leverage to easy and accurate adjustmentWidely used in labs for keeping the clamp in placeColour:Black+blueMaterial:Metal + plasticPackage Contents:5 x Lab ClampOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.