Crain 505 Knee Kicker has a telescoping steel tube construction making it one of the most durable knee kickers available with four length adjustments from 21" to 25". The visual pin depth dial provides nine different depth settings for various carpets. Power rods extending through the pin plate provide support and improved force transfer to the carpet. The gripping head includes three nap grips and a pin plate with 16 hardened steel pins. The standard-thickness bumper is made from rubber for durability and provides a firm feel and impact that is preferred by many installers. Comes with a gripper cap. The bumper, nap grips, and pin plate are replaceable. Net weight: 5.88 lbs. Replacement bumper: Part No. 1505-01. Replacement gripper inserts: Part No. 1505-K. Replacement pin plate: Part No. 1601-B.