Covert QRL, Warrior Alpha QX, Warrior Dynasty HD1) usually are the lightest sticks on the market (390-470 grams in a senior stick). In addition to the increased torque that these composite sticks possess, the sticks do not warp or absorb moisture like their wooden counterparts. When the player is standing on his skates with the stick upright, on the toe, perpendicular to the ice, the top of the shaft should stop just below or above the chin, depending on personal preference. Defensemen tend to use longer sticks which provide greater reach when poke-checking. Ice hockey sticks are also used in rinkball. Inline hockey In the event of roller inline hockey, one-piece sticks are usually the same as ice hockey sticks. But when graphite shafts are used with replacement blades, it's quite common for the replacement blades to be made of mainly fibreglass with a narrow wood core. Fibreglass shaves down over time on concrete, sport court and blacktop surfaces where traditional wooden ice hockey replacement blades are more likely to splinter, split and/or crack on those surfaces. Underwater hockey The stick (also referred to as a pusher) for underwater hockey is relatively short compared to that for field/ice/roller hockey, and should be coloured either white or black in its entirety to indicate the player's team. The shape of the stick can affect playing style and is often a very personal choice. A wide variety of stick designs are allowed within the constraints of the rules of the game, the principal rule being that the stick must fit into a box of and that the stick must not be capable of surrounding the puck by any more than 50% of the puck's circumference, nor any part of the hand. A rule concerning the radiuses of projections and edges tries to address the risk that the stick might unintentionally become more of a weapon than a playing tool. Construction materials may be of wood or plastics and current rules now supersede those that previously required sticks to be homogeneous, although they almost always are anyway. Many players of UWH manufacture their own sticks of wood to their preferred shape and style, although there are increasingly more mass-produced designs that suit the majority (such as Bentfish, Britbat, CanAm, Dorsal, Stingray etc.) which in most cases are made of a moulded nylon or PTFE, and many styles can be obtained to suit either handedness.