The helmet attachment using original 3 M manufactured V HB 4991 adhesive and premium plastic base mount is high quality and the strongest. Comes with 1/4" to 2-Prong Adapter and Go pro Extension Arm for use with other accessories. Perfect for mounting on helmets, ski, skate, surf boards, dashcam, kayak or other action sports. Helmet adhesive mount compatible with Insta 360 ACE Pro, ONE X5, X4, X3, X2, X, RS, R, GO 2 3, GoPro Hero 13/12/11/10/9/8/2018/7/6/5/4/3+/Session, Go pro hero Max, fusion and DJI Osmo Pocket Action 5 Pro 4 3 2. Package including: 2 x curved adhesive mounts, 2 x Flat adhesive mounts, 4 x Horizontal Surface Quick-Release Buckles, 2 x 1/4" to 2-Prong Adapter for Gopro, 4 x Thumb screw, 1x 8.5cm Go pro Extension Arm, 1x 16.5cm Go pro Extension Rod. Flexible Adhesive Mount for Insta 360 X5 X4 X3 X2 X RS R, Go pro Extension Arm with Helmet Sticky Mounts Buckle Mount Screw Accessory Kit Compatible with GoPro Hero 12 and DJI Osmo Pocket Action Cameras