This offer is for one pair of clamps, the image illustrates their uses.
Features-
Clamping force up to 750 N
With special guide on the top section for grooves 12 x 6.5 mm to 12 x 8mm
Use with adapter on the bottom sectiona nd rotated top section for secure
fastening of guide rails from Festool, Protool, Metabo, Makita,
Hitachi/Hikoki, Dewalt, etc. and for clamping in profiles and on work
benches
Use with adapter on the top or bottom section for
step-over clamping
Use with or without adapter – for clamping
or spreading
Ergonomically shaped 2-part plastic handle with
pump lever behind the rail

Specifications-
Opening 150mm
Throat depth 60mm
Spread width 120 - 310mm