Low profile and aerodynamic, the Hammerhead is geared toward speed. PineCar round and cylinder Weights fit the pre-drilled weight cavities. There are extra grooves for optional extended wheel base. The Hammerhead is a rough-cut and ready-to-finish block for those who want a great racing car but may not have the necessary tools or skills.Pre-Cut measures approximately 1 3/4" w x 7" l (4.44 cm x 17.7 cm)