Slider wedge
Miner's iron wedge
Large wooden wedge for manoeuvring stone blocks
Patent wedge for coal, mkd. IV-22 D.S.&.A.
Four wooden wedges, used by Joseph Bramah in his workshop
Coal splitting wedge.
Mason's wedge (iron)
1874
Curved rectangular wedge
Patent wedge for coal, mkd. IV-99
Coal splitting wedge.
Ancient wedge (bergeisen) found in Cwmsymlog mine
Coal splitting wedge.
Coal wedge.
circa 1750s
Coal splitting wedge.
Coal splitting wedge.
Tramway wedges
coal mining wedge
Coal wedge
circa 1740