Michigan Administrative Code
Department - Labor and Economic Opportunity
MIOSHA
General Industry and Construction Safety and Occupational Health Standards
General Industry Safety Standards
Part 38 - HAND AND PORTABLE POWERED TOOLS
Section R. 408.13806 - Definitions; J to M

(1) "Jack" or "ram" means a device, except an automobile bumper jack, used for lifting, lowering or moving a load by application of a pushing force.

(2) "Low velocity tool" means a device which, when used with an explosive load, propels a fastener at a velocity less than 300 feet per second when measured 6 1/2 feet from the muzzle end of the tool.

(3) "Mushroom" means to overrun the shank or head of a tool by battering the striking end.