Materials:Made of solid 6061-T6 aluminum hard anodized all stainless hardwareWeight:1.5 lbs (0.68kg)・Custom designed fluted knob・Swing arm for Jr.3 gimbal head・Integrated quick-release・Increased swing capacity・Easier loading of heavy lenses・Adjustable vertical balance・Improved centering of lenses for panningThe Jobu Design Junior 3 Deluxe Swing Arm gives you an top mount alternative to using the quick-release clamp on the side of a gimbal head (sidemount). Designed for use with the Jobu Design Jr. 3 gimbal head this swing arm features an integrated quick-release which increases the swing capacity so that the maximum lens collar foot size can be taller than was previously possible. It also makes the gimbal head lighter and it has a custom-designed fluted knob for an improved grip. The swing arm makes loading heavy lenses easier and it's better for centering lenses for panning. Vertical balance is more adjustable as well. The overall weight of the Jr.3 gimbal head with this swing arm is 1.5 lb (680g).