HOSCO nut-slotting assist tool. Used for nut slot machining. Just by placing it on the fingerboard side and shaving, the depth of the nut slot can be accurately shaved.
Size: 12.5 x 80 mm.
Material: stainless steel
H=0.065" (1.65mm)
M=0.056" (1.42mm)
L1=0.050" (1.27mm)
L2=0.042" (1.07mm)
※If you purchase our items from out side of Australia, you might have to pay potential import charges. Please check the further details below. 
https://www.ebay.com.au/help/selling/selling-fees/handling-import-tax-fees?id=4121