Description: Quality Material: The Bosshead Clamp Holder is constructed with quality, sturdy metal, ensuring longevity and resistance against corrosion Adjustable Design: The Bosshead Holder features an adjustable design, designed with knob, clip is comfortable to hold, which is lab iron clip. Sturdy Grips: With its strong, reliable grip, the Test Tube Clamp Holder ensures stability when mounting equipment. It reduces the risk of equipment falling or slipping, providing users with peace of minds Stand Clamp Holder: Can be used for holding clamp in labs and research institutes, also suitable for home use,lab supplies Versatile Application: This Lab Stand Clamp Holder is good for holding lab glassware and apparatus securely in place. Its versatility makes it suitable for both educational and professional scientific environments Specification: Material: Iron Size Chart: Length:?11cm/4.33inch Package Includes: 4pcs Lab Stand Clamp Holder Note: 1.This is not infant toy, please take away from children to avoid eating.2.Please allow slight errors due to manual measurement and different monitors.