The Solar Tackle Lock and Load Indicator Head is precision engineered and compatible with all Solar indicator accessories, past and present, as well as many others. It builds on over 20 years of indicator design and is made in the UK. - Lock and Load heads are cleverly designed with 5 internal drag weights - Time-served, micro-adjustable line clip - Isotope slot - Interchangeable end caps (top and bottom) for customisation - Compatible with all Solar indicator accessories, past and present, as well as many others