HRB - Valve Spring Compressor Kit If you’ve been searching for a professional-grade cylinder head disassembly kit, the HRB Valve Spring Compressor Kit is what you’re after. Designed and used in house at HRB, this kit is at home in a professional working environment, or in the shed on the workbench. The rigid design makes for smooth disassembly and assembly, when used with the 1/4 drive adaptor in a drill or impact driver the HRB valve spring compressor can make the slow head building process speedy and effortless. Details: 6061 rigid aluminium body Billet stainless steel retainer cup with large cut away to help with assembly room Bronze bush body for smooth use ¼-inch drive threaded rod (can be driven with drill or impact driver) Anodised Different size retainer cups can be purchased separately for alternative engine sizes (smaller or bigger than what it is supplied with) Includes: Wall mount Valve spring compressor 2x specialist magnets Tweezers ¼-inch drive T handle ¼-inch drive adaptor