Key Features Drive Specification Designed For A ½″ Square Drive, This Is A Male Spline Bit Socket, Featuring A Spline Profile That Engages Fasteners With Multiple Contact Points—Enhancing Grip And Reducing Rounding. Size & Reach Measures M10 Spline Bit On One End, With A Lengthy 100 Mm Shaft, Perfect For Accessing Recessed Or Hard-To-Reach Spline-Head Bolts. Construction & Durability Built From Hardened Tool Steel To Withstand High Torque. The Long, Straight Bit Design Provides Secure Engagement With Fasteners. Typical Benefits Of Spline Sockets Multi-Contact Engagement: The Spline Profile Contacts Numerous Lobes On A Fastener Head, Offering Better Torque Distribution Than 6‑Point Or 12‑Point Sockets—Useful For Semi-Damaged Or Non-Standard Fasteners Versatility: Can Sometimes Work With 6‑Point, 12‑Point, Or Spline Fasteners, Increasing Its Usefulness For Mixed Hardware . Improved Access: Ideal For Deep, Recessed Bolts Where Short Bits Can’T Reach.