Proportionate grooves give you a consistent mud distribution on the wall and speeds up the pre-filling process. Made out of UHMW, the strong durable design makes these Mud Heads the best on the market. FEATURES: Quick release clip Channeled grooves for evenly dispersed mud and controlled flow Long lasting, durable and strong Machined using top quality Ultra High Molecular Weight materials Machined in Columbia's state of the art facility in Canada Columbia Grooved Mud Heads