Sonisat machine tool accessories provides euco adjustable collar for gangway and straddle milling operations. This euco adjustable collars eliminates the need of removing the collars and cutters to mount shims for fine adjustment. This particular collar has an expansion step and faces are parallel at times.A wide range of this collars are available in 7/8" - 2" or 16 mm to 60 mm bore dia. The brass/steel solid spacers are available in various bores with 0.001" - 0.093" or 0.05mm - 1 mm thickness.