The George Barnsley Double Iron is a very popular tool, it is used in shoemaking when setting sole edges
 
The Double Iron is a handcrafted edge iron that has a double lip on the top and a single lip on the bottom which is smooth and domed inbetween
 
The Double Iron is finished with a traditional square shoemakers beech handle
 
Available in sizes A-G
Working distances
A - 3mm
B - 4mm
C - 7mm
D - 9mm
E - 11mm
F - 13mm
G - 14mm
 
See below for bar sizing;
A - 6 x 6mm
B - 7 x 7mm
C - 8 x 10mm
D - 12 x 12mm
E - 14 x 16mm
F - 16 x 16mm
G - 17 x 17mm