Large: 180x250 mm

Vecnum Movelock

Battery type: Lithium ion battery

its a bit pricey for a very specific tool

Gloworm Unisize Headstrap Envelope Shipping Large: 180x250 mmTurn your light into a hands free head mounted light with the Gloworm Unisize Headstrap. The strap is adjustable for any head size and allows you to mount the Gloworm X1,X2, and XS lights via the QR helmet mount that comes included with Gloworm light. It is also compatible with the GoPro cameras. The head strap works best with Gloworm 2 cell batteries but is also compatible with the 4 cell batteries when used in combination with the elastic strap that