Just read some of the positive reviews this kit gets:
Designed to be used all day
Active flow technology maintains blower speed as filter or cartridge resistance increases
Scale travel lengths: 11-13/16"
Sharpen planer and jointer knives to a razor keen edge without removing them from cutterheads
Grizzly T32808 - 1/8" ER20 Spring Collet 44 PSI Just read some of theT32808 1 8" ER20 Spring Collet The T32808 ER20 Spring Collet is made to exact specifications using carefully chosen materials. Providing powerful clamping ability and repeatable accuracy, the ER20 collet is made of precision ground and hardened stainless steel. When chucked up in a CNC router, metal lathe, wood lathe, or milling machine that has an ER20 spindle, they can be used for routing, engraving, turning, boring, milling, drilling, and tapping