Grip › GRAPPLE BAR - 12" Image 1 of 1 GRAPPLE BAR - 12" $0.00 The Grapple allows you to make inline 90 degree connections between similar trusses anywhere along a perpendicular primary truss. Add To Cart Added! The Grapple allows you to make inline 90 degree connections between similar trusses anywhere along a perpendicular primary truss.