Park Tool BSH-4 Bladed Spoke Holder The BSH-4 is a valuable wheel building and truing aid that securely holds bladed spokes to prevent twisting. Four different sized slots to fit a wide variety of bladed spokes. Will hold blades from 0. 8mm to over 2mm width. Features Related Articles: MAVIC(R) COSMIC(R) CARBONE SLR SERVICEManufacturer's Part No: BSH-4UPC: 763477000859 | Park Tool | Bsh-4 Bladed Spoke Holder Black