Precise and durable construction This pin vise for resin casting molds is made of high quality alloy steel, rust proof and well polished. It has a silver surface and a polished handle, providing a refined look and smooth rotation. The precision 4-jaw chuck accepts twist drill bits from 1.0 to 3.5 mm and grips them tightly. The rough texture in four turning sections gives a non-slip grip, improving control. The tail bearing allows easy rotation to extend service life. Easy to use This silver jewelry making tool drill is simple to operate: unscrew the vise head, insert the drill bit, and screw the head tightly. Target the drilling position, fix the top of the handle while turning the handle. The clamp can be adjusted by rotating the head. The inner part of the swivel head pin vise is hollow, so you can store needles or other small items inside. Key features The handle is forged from aluminum alloy for impact resistance, with an oxidized surface that is both attractive and durable. The tail is equipped with a bearing for easy rotation, and it can accommodate a drill bit. The handle has an ergonomic design with a smooth texture for comfortable use. Compatible drill bits included Ten drill bits are supplied in five sizes: 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, and 3.0 mm. More sizes are available to meet different demands.