SPECIFICATION - 3 prong finger laboratory clamp can accommodate rods up to 20 mm, and the maximum width of the jaw opening is 90 mm HIGH QUALITY - 3 finger proge clamp with rubber coated prong jaws is made for strong die-cast construction. It is made of zinc-alloy covered jaws for protection and grip. Holds irregular shapes easily. EASY ADJUSTEMENT - The head of the clamp holder is large, which is easy-to-rotate in order to provide extra leverage to easy and accurate adjustment. APPLICATION - This set can be used for home, laboratory fixed test tube, etc. PACKAGE INCLUDE - Comes with 2 pc 3 prong clamp and 2 pc lab stand clamp Color: Picture Color Material: Metal Package Contents: 2*Adjustable Lab Clamp 2* Laboratory Stand Clip Only the above package content, other products are not included. Note: Light reflection 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.