Overview Reviews Product Description For an online PTO identification/selection tool, please click this link to access Neapco's online database Neapco Driveline Components Catalog Neapco Complete U-joint Catalog Product Videos Custom Field Driveline series Spicer® 1710HR Spicer® equivalent 6-4-6921-1X Country of origin USA Product Reviews Write a Review Write a Review × Neapco 2.500" 10 Spline - Spicer® 1710HR Series Bearing Strap End Yoke N6-4-6921-1X Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *