This Teng Head Change 3/8in AF combination spanner is designed to offer optimal torque and ease of use. 

Spanner size for changing Martinez hammer heads on M1 & M4

AF combination spanners offset 15° - DIN 3113A.

Manufactured from chrome vanadium steel with a satin finish.

Size 3/8 AF
Length 140mm

How to change the head on Martinez hammers

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