Yeah Racing 1/8th on-road wheel well marker
Coming from Yeah Racing is a multi-functional wheel well marker for 1/8th scale on-road cars. Made of carbon fibre and aluminium the tool allows for easy marking of 68mm IC track front, 76mm IC Track rear, and 105mm GT wheel wells, ensuring repeatable results every time. To mark the wheel wells, simply place the tool outside the body shell with the wheel nut as the centre point and draw the respective wheel well using a permanent marker. The included aluminium struts help keeping the jig in an upright position. The design also includes holes to mark the lower body height in 9mm to 15mm positions.
Source: Yeah Racing [yeahracing.com]