M-120-2R:
Single needle, drop feed, oscillating hook, reverse lever.Max Speed: 800 S.P.M.
Max Stitch Length: 8mm
Max Sewing Thickness: 7/16"
Needle: 214x2 TW

Use: Leather, canvas, vinyl, harnesses, webbing, bags, boots, parachutes, book binding, suitcases.

280L, 280LS:
Single needle, compound feed & walking foot, large horizontal hook, reverse lever.
Max Speed: 2,000 S.P.M.
Max Stitch Length: 8mm
Needle: DPx17 (135x17)

Use: Leather, vinyl, canvas, furniture, automobile upholstery.

M-520:
Portable single needle, walking foot, oscillating hook, reverse lever, 150 watt attached motor.
Max Speed: 1,100 S.P.M.
Max Stitch Length: 6mm
Needle: DPx17 (135x17)

Use: Leather, canvas, vinyl and furniture repairs and limited production. Can be carried anywhere! Farms, worksites, boatdocks, homework.

M280LS-18 (Long Arm):
Single needle, compound feed & walking foot, large horizontal hook, reverse lever, 18" free space long bed.

Max Speed: 2,000 S.P.M.
Max Stitch Length: 8mm
Needle: DPx17 (135x17)

Use: Leather, vinyl, canvas, furniture, tarps, tents, automobile upholstery.

M280LS-26: (Heavy Duty Walkiing Foot)
Single Unison Feed (Compound Feed & Walking-Foot) Long Bed Lockstitch Sewing Machine.
Max Speed: 2,000 S.P.M.
Needle:
DPx17 #23
Use:

M391, M391R
(With Reverse):

Zig Zag Embroidery, Monogram, Straight Stitch, Semi-Auto Lubrication.
Max Speed: 2,000 S.P.M.

M380: (Drop Feed, Walking Foot)
M380L: (Drop Feed, Roller Foot)
M380B: (Compound Feed, Walking
Foot Cylinder Bed Heavy Duty Machinery)
Max Speed: 2,000 S.P.M.
Needle:
135x17
Use: Leather, vinyl, canvas, handbags