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    The non rotating stabilizer(rubber sleeve stabilizer )is a special tool in drilling to avoid blade wear and wall damage.

Technical parameters and specifications

I.D. of casing	Sleeve			Body
	Length(mm)	O.D.(mm)	Blade Qty	I.D.(mm)	Top part Dia(mm)	Thread type
13 3/8" casing 313.6	500	313 -0.5 -0.8	4	71	165	NC50
10 3/4" casing 255.3	500	255-0.5 -0.8	4	71	165	NC50
9 5/8" casing 220.5	500	220-0.5 -0.8	4	71	165	NC50
7" casing 157.1	380	156-0.5 -0.8	4	44	127	NC38