The revolutionary Mag Grip is designed to provide a quicker easier & stronger attachment method for speedlite flash modifiers by eliminating the need for noisy velcro sticky adhesives & bulky straps through the powers of magnetism to attach our line of flash modifiers. strong Compatible Flashes when connected to the Mag Gripstrong Canon 380EX 420EX 430EX 430EX II 540EZ 550EX 580EX 580EX II 600EX-RT Nikon SB-24 SB-25 SB-26 SB-28DX SB-50DX SB-80DX SB-600 SB-700 SB-800 SB-900 SB-910 Sony HVL-F60M HVL-F58AM HVL-F56AM Olympus FL-50R FL-600R Yongnuo YN560 YN560-II YN560-III YN568EX-II YN565EX Neewer TT560 NW680TT680 Bolt VX-710 VX-760 VS-510 VS-560 Bower SFD680C SFD728 SFD885 SFD926 SFD970 Pentax AF540FGZ AF540FGZ II AF360FGZ Sigma EF-610 Metz 44 AF-1 52 AF-1 52 AF-2 58 AF-1 58 AF-2 Vivitar DF-286 DF-293 DF-383 DF-483 DF-583 385HV Phottix Mitros Mitros Other similarly sized flash units