Available sizes: PR-866-042CT .875 dia. x .042 width PR-927-042CT .927 dia. x .042 width True Arc Wrist Pin Locks Tru Arc Piston locks are Designed for Pistons with floating wrist pins in double width lock grooves. Made from carbon steel, they are easy to install and remove but not recommended for high horsepower applications.   Check Out Available sizes: PR-.875-.042-CT .875 dia. x .042 width PR-.927-.042-CT .927 dia. x .042 width CS25 Wiseco .990 dia. x .042 width Spiro Locks Spiro Locks are installed by spreading the lock between 1/8"to 1/4" and rotating the lock into the groove in the piston pin boss. Made from carbon steel they are recommended for high horsepower applications.   Check Out Available sizes: PR-927-073-MW .927 dia. x .073 width PR-990-073-MW .990 dia. x .037 width Wire Locks   Check Out Available sizes: PR-875x2.250x.090 875 x 2.250 x .090 $ 149 PR-878x2.250x.090 878 x 2.250 x .090 $ 159 PR-927x2.250x.120 927 x 2.250 x .120 $ 159 PR-927x2.500x.150T 927 x 2.500 x .150T $ 169 PR-990x2.930x.180T 990 x 2.930 x .180T $ 169 PR-990x2.930x.150T 990 x 2.930 x .150T $ 169 PR-927x2.750x.180T 927 x 2.750 x .180T $ 169 Tool Steel Wrist Pins   Check Out