Twin Auto Screw Feeder Machine Shape of Thread: M Srew Screw material:With iron Material. Net weight:3.5kg Wanerun-900 Twin Auto Screw Feeder Machine Specifications:→ Applicable screw size: from M1.0 to M3.9→ Applicable screw length (under head): up to 20mmFeatures:→ Easy to replace the rail to meet the change of screws;→ One machine can copy with 8 different sizes of screws just by replacing the ...