Robust chain for 30% more strength.. KMC patented SL-X technology keeps the grease where it belongs; in the chain's bearings, resulting in a longer life..  Unique stretch-proof treatment has effectively enhanced the durability by reducing the attrition between the inner plates and pin..   Specification 1/2"" X 1/8"" - 112 Links, pin length 10.0mm. Compatible with: Track / Single speed. Brass plated * Top-Performance. Lightweight: 375 grams. Extremely durable. Super Rigid; maximum efficiency. Patented Sealed Locking design.