This is a new spiral drills
This is spring loaded and holds twist drill sizes: 0.8 to 1.15 mm
To use just move the center piece up and down
It measures approximately 4 3/4'' (120 mm) long

Technical Details

Product Details

Package Dimensions
Width : 0.59 inch
Height : 0.51 inch
Length : 4.29 inch

Shipping Weight: 0.8 ounce (View shipping rates and policies)

ASIN : B000RB2A9Q