From G5:

TEKAN-II Broadhead The, all new, TEKAN-II TM is the second generation mechanical that has improved blade retention and is compatible to all arrow types/sizes. Featuring a robust one-piece stainless steel ferrule construction, which contains no pins or screws, also has a tough 5/8" cut-on-contact tip. The "camming" main blades are .040" thick and are truly simple to replace. In flight the blades are held closed and secure with an o-ring. Not only does this o-ring secure the blades in flight, but actually help “spring” open the blades once the target is hit. Bar none this is the mechanical of choice. STATS: - Two main .040" thick blades w/ a tough 5/8" cut-on-contact tip - One-piece “Head to Thread” TM Construction - Patented MonoflowTM Technology - Re-Sharpenable Patented under Patent No’s 6,290,903 & 6,595,881 & 6,749,801. Other patents pending.

Product Features: Grain Wghts: 100 & 125 Cutting Dia.: 1-5/16” cutting diameter Straightness: +/-.002" Material: Solid Stainless Steel Design: Rearward sliding blade mechanical