Professional-grade end controls enable the setup of 2:1 to 6:1 purchases. Created for high-performance, smooth-running systems, Carbo control blocks with Delrin¨ ball bearings allow for efficient and instantaneous adjustment and release of cars while under load. Assemblies securely attach to the track, avoiding the need for extra holes. Sturdy, one-piece bases and cam arms are precision machined from a solid block of aluminum. Compact, low-friction block components, combined with Cam-Matic cleats, ensure minimal weight. Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.