Inventory › Snap-On PFMTS4E 3/8" MTS-4 Pinless Bit Socket Driver. Image 1 of 2 Image 2 of 2 Snap-On PFMTS4E 3/8" MTS-4 Pinless Bit Socket Driver. $29.99 Snap-On PFMTS4E 3/8" MTS-4 Pinless Bit Socket Driver. Inventory # 817266-11 Add To Cart Added! Snap-On PFMTS4E 3/8" MTS-4 Pinless Bit Socket Driver. Inventory # 817266-11