Feature●PowerCrown technology improves drivability and reduces buckling●Coated finish increases withdrawal strength●Fits Bostitch tools: T6-8, T6-8OC2, PC1000, PC2000, PC4000, PC4000C1, PC5000, H30-8, P6C-8, USO56-2●1000 Per Box (2 Boxes)●ImportedDescription 7/16 in crown. For use with Bostitch PC1000, PC2000, PC4000, PC5000, H30-8 and P6C-8 tackers. STCR50191/2-4M and STCR50191/2-1M do not fit H30-8 or P6C-8 tackers. STCR50191/2-1M also fits PC3000.