This replacement blade is specifically designed to replace the blade in the ST-100-2830 cut-strip tool. The replacement blade features the following:

Dual tempered spring steel blades ensure clean nick-free cutting on 28 - 30 AWG wire
Can be used in any of the ST-100 series, OK-3907 series, or JIC-4473 wire strippers
Strip Gauge
Strip Gauge: 28-30 AWG (0.32 mm-0.25 mm)