These deluxe dartboard mounting bracket includes dartboard mounting screw set (2 to mount the bracket to the wall and one for the back-centre of the dartboard), spring steel shock absorbers, shock absorber tacks and dartboard mounting bracket instructions. Bracket screw specifications: Shaft length: 15mm. Shaft width: 4mm. Head width: 9mm. Overall length: 18mm. Dartboard screw specifications: Shaft length: 24mm. Shaft width 4mm. Head width: 9mm. Overall length: 27mm Dartboard mounting height: from floor to the centre of the bullseye:5 foot 8 inches (1.73m) Dartboard throwing distance:from the face of the dartboard to the oche (throwing line):7 foot 9 1/4 inches (2.37m).