side cutter for overlock machine blower-type chain-off thread suction device cloth ... mc-9 mc-9 is equipped with auto-lifter blower-type chain-off thread suction device ... r fixing screw for f unit asm .r tube connector male one-touch connector selection ... parts instead of the tube connector pneumatic type knee-operated pneumatic ... setting on the machine furthermore knee-control type differential-feed adjusting device ... is built in the attachment it controls a differential-feed ratio as desired ... the differential-feed ratio is controlled with the knee lever a ruler used for ... can be changed over with a fingertip control the dimension of ready-made tapes can ...