Standard:
Brother KH35
Brother KR341, manual/basic, foldable
Brother Profile 500, metal, 4.5 mm
Mid-gauge
Brother KX350, plastic, 7 mm
Brother KX355, plastic, 7 mm
Bulky:
Singer HK100, plastic, 8 mm
Brother KH210, metal, 9 mm
Brother KH220, metal, 9 mm
Brother KH230, metal, 9 mm
Dual gauge/convertible
Brother KH360, 4.5/9 mm, basic/manual, plastic bed
Brother KH370, 4.5/9 mm, basic/manual, plastic bed
Brother KH390, 4.5/9 mm, basic/manual, plastic bed
Brother KH395, 4.5/9 mm, basic/manual, plastic bed
Brother KH400, 4.5/9 mm, basic/manual, plastic bed