A simple and portable instrument for use by the geotechnical engineer to determine in-situ shear strength of cohesive soils. The device consists of a torque head with direct reading scale into which is fitted one of two vanes. A max. Reading pointer makes reading easy. The tester is supplied complete with one 19 mm (range 0-120 kPa) and one 33 mm (range 0-28 kPa) vane. Extension rods are available separately as accessories. A carrying case is also supplied.