Chromium Alloy Steel
RAYMOND 204-740 Die Spring 10" Length - Blue - Medium Duty (40mm Hole / 20mm D)
The 980-KIT works well with both wood and metal materials without adjustments.
RAYMOND 2" x 10" Die Spring - Gold - Extra Heavy Duty - 1" Rod (105-840)
A nice touch with these Allen Bradley fuses is the built-in blown indicator.