Model : BR-120M - Flat Button Robot Easy Installation to Any Kind[Brand] of Chainstitch Button Sewers. With This Device a Beginner shows 3 to 5 Times Higher Productivity than that of skilled workers. Easy Operation of Adjustable Button Width & Thickness Control Levers by operators, When The Size & Shape of Buttons are changed. Semi-Permanent Life, As it is a Super-Precise Product made of Special Alloy! Application : - All Kinds of Flat Button Sewing Operation : - For Any kind of Shirts, Blouses, Suits, Coats, Work Clothes, Uniforms, Womans Wears and so on. Specification : - Feeding Method : Dual Use Of Mechanical & Electronic Method - Feeding Time : 0.2 Second - Electric Spec. : 50/60Hz Dual Cycle 110V/22V Dual Voltage - Available Button Size : * Hole : -2Holes & 4Holes Are Standard. : -3Holes & 5Holes Are Option. * Width : 8 ~ 32 Mm * Thickness : 1.5 ~ 7.0 Mm