is the effective mesh length

The description of use is taken directly from the manufacturer's documentation

som er nem at holde ren i daglig brug

Service mat size: 600 x 600 mm

Bahco Momenttester 0,1-3Nm Unit(s):Pcs is the effective mesh length. Ideal tool for checking torque wrenches in workshops, service stations and production lines. Up to 12 measurement units: Nm, lbf. ft, lbf. in . User friendly (4 button interface). It can be used clockwise at temperatures from 10 C +50 C. Allows for up to 10 target torque settings and relevant tolerances. Micro USB connector enables 2 way communication with PC or tablet. . NO internal memory, but can be connected to an external PC or tablet for data