Aiming to improve on the default design, the Leofoto SF-01 is a replacement lens foot for Sony Sony FE 70-200mm f/2.8 GM OSS and FE 100-400mm f/4.5-5.6 GM OSS lenses. This aluminum support features an Arca-Type double-dovetail design, 1/4"-20 and 3/8"-16 receivers, and a QD (Quick Disconnect) socket for quickly attaching a compatible strap or sling. Two M3 screws are included for use as optional safety stops