IMORDEN 48"/120cm Ball-bearing Slider for DSLR Camera, Phone and Gopro (Max Load: 15lbs)for Youtuber, Use on Tripod SMOOTH SLIDE: FOUR roller bearings under the top plate working well with two Chrome Coated Shaft in the rail can prevent rust and corrosion; Max load: 7kg/15lbs. TRIPOD HOLES: Both 1/4" and 3/8" mounting holes on two end sides and the middle bottom of track provide multiple mounting options. Positioned on one or two tripods. STABLE AND STEADY: Bubble level on top of plate. Adjustable legs with non-skid rubber feet can increase the friction between slider and ground and make the footage more stable. COMPATIBILITY: You could attach your camera, smartphone like iPhone and Gopro directly with 1/4'' screw on the carriage or use the 1/4'' to 3/8'' sliver screw adapter to mount a ball head or tripod head for flexible shooting. Note: As a gift, a 1/4" to 3/8" SILVER screw adapter is attached with the 1/4" screw on top of the carriage(the improved slider). Sometimes you need to unscrew it with tools, such as pliers. (Ps: If you received a 3/8" to 1/4" GREEN screw adapter, pls attention do NOT try to attach it with your camera. It can only hold light weight accessories.)