Amazon.com: CASOMAN 10 Piece Spline Tip Bit Socket Set, M-Type, S2 and Cr-V Steel, Extra Long 4'' Length, M4-M18, XZN Triple Square Spline Bit Socket Set : Tools & Home Improvement
13-PC. 3/8" Drive SAE Spline Socket Set - SX13SBRPT | Mac Tools
Kobalt Universal Metric 1/2-in Drive Spline 19-mm Shallow Socket in the Sockets & Socket Sets department at Lowes.com