retention the head portion 106 of the tool pick 102 can include any suitable features including for example a shoulder region 114 a tapered region 116 and a tip 118 the tip 118 can be made from a hard material such as tungsten carbide the sleeve 104 includes a hollow cylindrical like body having a first end 122 a second end 124 and an axially continuous surface 126 therebetween the axially continuous surface 126 is formed by a first surface portion 128 joined to a second surface portion 130 by a stepped portion 132 the continuous surface 126 includes a first axially extending slit 134 extending from the first end 122 to the second end 124 the axially extending slit 134 allows for circumferential compression of the sleeve 104 when installed in a bore of a block the first surface portion 128 of the sleeve 104 has a larger diameter d 1 than the diameter d 2 of the second surface portion 130 of the sleeve 104 connecting the first surface portion 128 and the second surface portion 130 is a stepped portion 132 the stepped portion 132 has an axially varying diameter in exemplary embodiments the second surface portion 128 of the sleeve 104 is a rearwardmost portion e g rearwardmost relative to the head portion of the tool pick when the sleeve is positioned about the shank.