The Iseki TK21 is a compact utility tractor produced from 1996 to 2001 as part of the TK Series by Iseki. It features a 24.7 hp (18.4 kW) Isuzu 1.4L 3-cylinder liquid-cooled diesel engine, a 16-speed transmission with forward and reverse gears, and four-wheel drive. The tractor has a two-post folding ROPS for operator safety. It is equipped with standard agricultural tires sized 6-14 front and 8.3-24 rear, and a rear JIS1 type hitch. The PTO rear type is 540 rpm with multiple engine RPM settings. The TK21 is designed for compact utility tasks and offers a wheelbase of 61.6 inches (156 cm) and weighs 2557 lbs (1159 kg).