This low-profile hexagon cassette is for use with compatible RSL-Series modular drive units. The low-profile design with an optimum nose radius gives you the access needed for hassle-free bolting in tight spaces.For heavy use and enduring durability, RLP-Series Cassettes are constructed from robust steel and are easily fixed to the RSL Drive Unit using four Allen Key Bolts.The wide range of interchangeable hexagon cassette sizes provides the versatility to complete a wide range of bolting applications. For exceptionally tight spaces consider the RLP Slimline Stepped Width Cassettes which can also be used with the same drive unit.