ThunderFit Silicone Wedding Band/Engagement Ring - 3 Rings Pack - 8.7mm Wide (2mm Thick) - Middle Line (13) Ultra-light weight aluminum alloy construction, able to support up to 6.7 lbs. Universal Thread Mount : Attach any DSLR or still camera, video camera, ball head. Comfortable Grip : Features a soft foam grip and safety wrist strap. Safe and Secure : Built in non-skid rubber foot with retractable leg spike Satisfaction Guarantee: Backed with WAAO 90-Day 100% Satisfaction Guarantee.