Chainsaw10
TreeHouser
Good to see they finally got the 1/4" ones too.
Those 2 in 1 file guides are made by Pferd for stihl.
http://www.pferdusa.com/products/201b/201b01/index.html
http://www.stihlusa.com/products/chain-saws/accessories/filing-tools/2in1file/
I have a pferd for 3/8 chain....but it doesn't look like there is a pferd version of the 1/4"' .043.