StonyLab 2-Prong Swivel Clamp, Universal Lab Clamp with 7 inch Rod for Laboratory Use

StonyLab 2 Prong Swivel Clamp, Sturdy 2 Prong Single Adjust Multipurpose Extension Clamp Grip Adjustable Lab Clamp with 7 inch Rod for Laboratory Use

StonyLab 2-Pack Adjustable Bosshead Clamp Holder, Lab Heavy Duty Boss Head Clamp Holder Aluminum Alloy Body, up to 16mm Rods for Laboratory Use

stonylab 4 Prong Adjust Swivel Clamp, Sturdy 4 Prong Multipurpose Lab Clamp Extension Clamp with 100 mm Max Opening Lab Accessory