Grizzly T24512 HSS Center Drill Set Mini Low on the job pump swaps clampseries_4400 on the job pump swaps 8 Maximum Fluid Pressure (psi) 3600 Maximum Height (in) 89 Maximum Height (mm) 2261 Maximum Operating Temperature (°C) 70 Maximum Operating Temperature (°F) 158 Maximum Working Pressure (bar) 240 Maximum Working Pressure (MPa) 24 Minimum Height (in) 70 Minimum Height (mm) 1778 Model Therm O Flow Overall Depth (in) 20 Overall Depth (mm) 508 Overall Width (in) 45 Overall Width (mm) 1143 Power Type Pneumatic Pump Ratio 36:1 Pump Type Severe Duty Series Warm Melt Type Supply Unit Weight (kg) 172 Weight (lb) 379 Wetted Material Electroless Nickel Plated Ductile Iron Material: High speed steel These center drills are used to cut holes in the center of a piece of stock on a metalworking lathe