The swivel screw adjustable clamps are suitable for laboratory use, compact size and simple structure design can increase stability. appearance, can be reused many times, made of solid iron material, easy to adjust and grip, reduce hand fatigue. Features - Color: Silver. - Material: Galvanized iron. - Size: 4.00X3.50X1.70cm/ 1.57X1.38X0.67inch. - The swivel screw adjustable clamps can be adjusted to effectively clamp the hose and control the flow of solution. - The swivel screw adjustable clamp has simple structure and built-in multiple screw ports for easy operation. - Keeping your laboratory tube precise in place, it is beautiful and , not easy to rust. - The hand grip is ergonomically designed to make your grip more comfortable, which can effectively improve your work efficiency. - The swivel screw adjustable clamps your operation more stable and reliable, and it also has stronger carrying capacity. Package list: 12 x Swivel Screw Adjustable Clamps