This highest quality folder will fit 35800 BQ & DQ CLASS Union Special Industrial "Sew Off The Arm" Sewing Machines. This folder fits machines with 8 or 9 Gauge parts. This is the same as 8/64" (1/8") or 9/64" Gauge. This folder is designed to be mounted onto the machine arm of UNION SPECIAL, KANSAI, and KINGLINE "Sew Off The Arm" Industrial Sewing Machines.

This Lap Seam Folder is commonly used for seaming all types of pant legs or other tubular closing operations.

There are 4 different WEIGHTS:

MEDIUM: for very light fabrics like nylon rip-stop or light apparel applications.

MEDIUM HEAVY: for more general sewing on most woven fabrics and common apparel applications like cotton pants.

HEAVY: for Heavy Apparel applications like corduroy pants, light to medium denim, light to medium canvas products, and light to medium weight awnings.

EXTRA HEAVY: for the heaviest industrial applications like tarps, tents, heavy canvas products, heavy awnings, and very heavy denim.

This attachment makes the inseam, seat or side seams on blue jeans. It is also used for hot air balloons, parachute seams, awnings, inflatable jumping jim, canvas products, sails, tent seams, ETC.