ITEM NAME:1" Ball Adapter with 1/4" Screw Underwater Housing Camera System Diving Arm Description: Anti-loosening and anti-reversing; The product is designed with movable anti-loosening nut. Tightening nut can prevent the product from loosening or reversing during use, which may affect the shooting. Screw adjustable; The screw can be adjusted to the length of 2mm~9mm as required, and can be well locked and fixed even in some shallow holes. Available wrench reinforcement; With hexagon wrench reinforcement, even using the hand hard counterclockwise rotation will not be loose. Stainless steel 304 screw; Screw is used stainless steel screw, strength and corrosion resistance are very strong, in normal use, there will be no fracture, stable performance. 1 inch ball head, 1/4" screw. Fit for Gopro for Osmo Action for Xiaoyi for Tencent EKEN Package Includes: 1 Piece Ball Adapter Note: All dimensions are measured by hand, there may be small deviations. Color may vary slightly due to the color setting of each individual monitor. Thanks for your understanding. Please enjoy your happy shopping time!.Stainless steel 304 screw; Screw is used stainless steel screw, strength and corrosion resistance are very strong, in normal use, there will be no fracture, stable performance. Anti-loosening and anti-reversing; The product is designed with movable anti-loosening nut.