Posthole Digger Driveline Assembly, size 4. Driveline minimum C-to-C is 45" (1145 mm), maximum C-to-C length is 71" (1800 mm), total collapsed length is 53" (1345 mm). Tractor ends: 1-3/8" 6 Spline and implement ends are 1-1/4" round bore with 3/8" pin hole. Driveline rated as category 3 (35 hp). Fits Bush Hog, Land Pride, and Rhino applications.