SLIK 3-way small head (model number unknown) is a fine-thread type (1/4 inch). This is a set of the head and a dedicated quick-release shoe. Note 1: This is a small head that can be set on a tripod with a fine thread (1/4 inch). Therefore, it cannot be attached to a tripod with a coarse thread (3/8). Note 2: The long lever will be removed for packing, so please screw it in firmly when using. Note 3: To set the quick-release shoe on the head, the design allows you to prepare the lever tightening by pushing the quick-release shoe down. This is a used item. We would appreciate it if you could refrain from returns, refunds, or opinions after purchase.