Self-retracting ram springs for fast ram retraction Narrow chassis design fits easily between tandem wheels Four adapters (1.875" and 2.625" diameter saddles, 2" and 4" extension adapters) with handle mounted saddle holder included Release knob on top of handle Lift range: 8.37" to 21.12" Designed for heavy duty truck and trailer shop use, rail and bus work, and portable for roadside service calls.