• 1. Tripod socket compatible with Sigma lenses: Sigma 60-600mm f/4.5-6.3 DG OS HSM Sports, 70-200mm f/2.8 DG OS HSM Sports, 500mm f/4 DG OS HSM Sports, and 150-600mm f/5-6.3 DG OS HSM Sports; Sigma 1; Sigma 50-60 Not compatible with 0mm f/5-6.3 DG OS HSM Contemporary and other lenses • 2. The tripod foot of the lens is improved based on the original tripod mount base. 3/8 screw holes and stainless steel non-slip nails are added Added finger position for better grip Additional strap holes for easy hanging • 3. Tripod mount ring stand features 39mm Arca Fit quick release plate at the bottom and compatible with RRS / ARCA-SWISS 39mm fit tripod head clamp • 4. Lens bracket collar stand is made of aviation aluminum, CNC precision machined, anodized surface with stainless steel screws. The volume is about 12 x 4.2 x 2cm (include screws), the net weight is about 125g. Mounting hole data is collected from Sigma original lens • 5. Package included: 1 x iShoot Lens Collar Foot IS-THSM1560 (Note: Other items in pictures not listed here are for illustration purposes only and are not included)