Lezyne SV Tools are compact, low profile tools made with lightweight and durable materials. They feature CNC machined aluminum side plates and a forged and CNC-machined aluminum chain breaker (9/10/11 speed chain - SV10 and 11). The Stainless Steel bits and fastening hardware are durable and corrosion resistant. Forged, Center-pivot bits increase tool rigidity and improve ergonomics. SV - 11 HEX: 2, 2.5, 3, 4, 5, 6, 8mm Torx: T25, T30 Flat Head Chain Breaker(9/10/11)