Features 1、Aluminium Alloy: This bosshead clamp holder adopts aluminium alloy and plastic material, which is sturdy and highly durable. 2、High Stability: This laboratory stand clamp holder is perfect for stabilizing clamps where you don't need extraordinary support. 3、Easy Adjustment: This laboratory bosshead clamp holder can be easily rotated and adjusted, easy to rotate knobs help provide extra leverage. 4、Wide Application: This German clamp holder is usual clamp accessory in laboratory, also suitable for home use. 5、Proper Size: This clamp holder also features proper size and light weight, easy to carry and use, accurate and easy to adjust. Specification Item Type: Bosshead Clamp Holder Material: Aluminium Alloy, Plastic Purpose: It Is Used In Laboratory Or Science Classroom To Connect The Fixture To The Iron Table Product Size: Approx. 17 x 4.5 x 4cm / 6.7 x 1.8 x 1.6in (Manual Measurement, Slight Error May Exist) Package List 1 x Bosshead Clamp Holder