FLIR Systems TA50 Universal Magnetic Hanging Strap

Amazon

Securely fastens to the meter with an integrated mounting tab Magnetic strip designed for DM9x series multimeters or any meter that accepts a 1″ (25 mm) strap Durable nylon strap 2 Year warranty

Test-meter.co.uk

Universal magnetic hanging strap for FLIR measurement devices. Attaches to ferrous surfaces. Durable nylon construction. Compatible with DM9x multimeter series. Two-year warranty.