ANSWER Holeshot are Shimano compatible spline pattern, stainless steel cassette cogs are CNC machined and have multiple holes cut out to help shed weight.

Available in 15, 16.17 & 18t

Cogs will fit Mini, Expert, and Pro Holeshot hubs.

Weights
14T: 0.8 oz
15T: 1.0 oz
16T: 1.2 oz
17T: 1.4 oz
18T: 1.8 oz