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SOSR_SERIES Spline Zero-Degree Offset Combination Wrenches

16 sizes ranging from 7/32–1"

Features and Benefits

  • Uni-Directional, zero degree offset gear design utilizes innovative Snap-on® technology, to deliver more power in less lateral space, helping to access and remove the most stubborn fasteners in tight spaces
  • Ratcheting gears with up to 60 teeth, in conjunction with 8-tooth pawl, minimize swing arc needed to remove fasteners in restricted spaces
  • Gears are cold-formed and use the same propietary steel found in Snap-on® sockets for ultimate toughness and durability
  • Flank Drive® wrenching system on box-end generates up to 15-20% more turning power than conventional wrenches, while minimizing risk of tool or fastener damage
  • Wrenches are manufactured from special alloy steel, precision-forged, and heat-treated for optimum strength and durability


Primarily aviation where spline fasteners are frequently more prevalent


Size, inches (Spline)Stock No.ABCDE
7/32 (#7)SOSR75/817/321/45/324-27/32
1/4 (#8)SOSR85/817/321/45/324-27/62
9/32 (#9)SOSR921/3211/161/43/165-25/32
11/32 (#11)SOSR1123/323/49/323/166-1/4
3/8 (#12)SOSR123/427/329/327/326-3/4
7/16 (#14)SOSR1427/3215/165/167/327-7/32
1/2 (#16)SOSR1615/161-1/1611/321/48-5/32
9/16 (#18)SOSR181-1/321-5/3211/321/48-5/8
5/8 (#20)SOSR201-1/81-5/163/89/329-9/16
11/16 (#22)SOSR221-3/161-3/813/325/1610-1/32
3/4 (#24)SOSR241-9/321-9/167/1611/3210-31/32
13/16 (#26)SOSR261-9/161-23/321/23/812-11/32
7/8 (#28)SOSR281-9/161-13/161/213/3212-15/16
15/16 (#30)SOSR301-13/161-15/169/1613/3214-1/8
1 (#32)SOSR321-13/162-1/329/167/1614-23/32
Combination Wrench

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