Milwaukee 48-25-5325 SWITCHBLADE 10 Blade Replacement Kit – 1-1/2” Designed for heavy duty professional use, the Milwaukee 48-25-5325 SWITCHBLADE 10 Blade Replacement Kit – 1-1/2” maximizes productivity by eliminating downtime and the cost to resharpen. The replacement blades are made with hardened steel to increase bit life. The size is engraved on each blade.