A new series of magnetic clutches & couplings from Sterling Instrument (An ISO 9001:2000 AS9100B Registered Manufacturer) features no friction or wearing parts, uses no electricity and no magnetic particles to leak. These units, identified as the S90MCC series, are stocked in 3 different hollow bore sizes: .625", .750", and .875". Their torque range is from 3-70 lb.in. and they weigh 14.2 lb. Other features include being incredibly accurate, repeatable torque control, easy to adjust, easy to apply, perfect for continuous slip, zero “stick slipâ€