The flat--bottom mill shoe whose bottom face is overlaid with YD alloy or abrasive materials is used to mill downhole junks.

Technical specifications and parametes
 

Type	OD (mm)	Connection	Max.Milled OD In Sections (mm)	Casing Size
PMB114	D x 250	NC26	94,95,96,97,98,99	4 1/2"
PMB127	D x 250	27/8"REG,NC31	106,107,108,109,110,111,112	5"
PMB140	D x 270	NC31	116,117,118,119,120,122,123,124	5 1/2"
PMB168	D x 280	NC38	145,146,147,148,149,150,151,152	6 5/8"
PMB178	D x 290	NC38	152,153,154,155,156,157,158,159	7"