( 3/8 INCH DRIVE ) ratchet approved for live working up to 1,000 volts.( 72 TEETH ) gives a working arc of just 5 degrees. More teeth are engaged simultaneously which creates greater torque/strength without the mechanism failing.(TWIST REVERSE ) for quickly and easily changing between tightening and loosening.( ERGONOMIC DESIGN ) for anti slip and comfort especially in cold environments.( DIN3122D and IEC60900 ) Design and manufactured to DIN3122D and IEC60900.