The F1 fragmentation hand grenade is manufactured by Thales Australia and is used by the Australian Defence Force replacing the M26 grenade. The F1 is a high explosive, anti-personnel grenade with a lethal radius of , casualty radius of and a safety radius of . The grenade weighs 375g and contains over 4000 2.4 mm steel ball fragments arranged to achieve uniform distribution of lethal fragments through 360° upon functioning. It has a fuse time of 4.5 to 5.5 seconds. Thales Australia also manufactures an F3 practice grenade, being a non-fragmentation replica of the F1 used for training, incorporates a high impact aluminium die cast body and hazard band with a distinctive appearance. The F3 practice hand grenade has a replaceable pyrotechnic fuze that displays an audible output and a distinc