A range of quality traditional workholding equipment. Manufactured from high quality steel and case hardened all over. All sleeves and sockets are fully hardened and ground internally and externally. ISO 238 BS 1660 : 2. | | Drill Sleeve & Drift Set | Set of three drill sleeves 1 – 2, 2 – 3, 3 – 4 MT. Fully hardened and ground inside and out. Two drill drifts to release 1 – 2 and 3 – 4 MT.