This pin vise is precision crafted to meet the needs of the most demanding hobbyist. The 3/8 inch anodized aluminum handle has a permanently mounted self centering steel chuck that accommodates drill bits from #52 (.0635) through #80 (.0135) and non slip knurled surface for a positive grip. it includes 6 assorted drill bits in a clear plastic tube with cap that slides inside the vise's handle for easy storage.