WALTER - STEP DRILL REAMER -5/16" 1-1/16"(3STEP) - 01W955

The Multi-Step reamer step drill kit comes in three different sizes, providing only the only tools you'll need to enlarge holes in metal plates up to 1/2" thick - from 5/16" diameter all the way to 1-1/16".
Made with premium grade HSS to last longer
Stepped geometry for fast hole making and enlarging
3/8" reduced shank with 3 flats to reduce slippage in drill chucks
Black oxide surface treatment increases wear resistance