BS8020 Insulated Fibreglass Pick Shaft. Pultruded fibreglass core with an injection moulded polypropylene outer. BS Standard 3'' x 2'' eye. Tested and made in conformance with BS8020:2011. Tools for live working. This shaft is designed to be a tap on fit, however when fitting a replacement shaft, the eye should be dressed to suit the hammer head by a competent person. BS8020 Insulated Fibreglass Pick Shaft. Pultruded fibreglass core with an injection moulded polypropylene outer. BS Standard 3'' x 2'' eye. Tested and made in conformance with BS8020:2011. Tools for live working. This shaft is designed to be a tap on fit, however when fitting a replacement shaft, the eye should be dressed to suit the hammer head by a competent person.